KINGRAY BioWave – a home magnetic device in the “terahertz” category
KINGRAY BioWave – a home magnetic device in the “terahertz” category
Your home magnetic device for warmth and relaxation
After prolonged standing, walking or hours at your desk, your legs deserve some attention. With BioWave, you have a magnetic wellness device at home that you can sit down beside comfortably and enjoy a warming session. The controls are right in front of you.
The set is built around a foot platform that the manufacturer describes as electromagnetic. A heated belt and LED lighting directed at the tops of the feet complete the set. Together, they provide a platform with adjustable intensity and local warmth for regular care at home.
Who is KINGRAY BioWave ideal for?
- For people with sedentary jobs: Do you spend hours at a computer, in the office or behind the wheel and feel tension and stiffness in your lower limbs in the evening? BioWave brings warming relaxation after a full day of static strain.
- For people who spend all day on their feet: Whether you work in retail, hospitality or healthcare, or are an active athlete, your feet work hard. Give them the luxurious relaxation they deserve.
- For lovers of evening rituals and biohacking: If you are looking for a way to effectively calm your body before bed, slow down your mind and create perfect thermal comfort for an undisturbed night's rest.
- For people prone to “cold feet”: The pleasant, deeply spreading warmth from the platform and infrared belt can comfortably warm the skin, leading to an immediate feeling of physical comfort.
- For seniors who want to stay active: Comfortable seated use with simple controls is ideal for older adults wishing to maintain overall physical comfort and independence.
Suitability also depends on your health. Before purchasing, read the restrictions below and the complete instructions. The device is not suitable for children under 14; users aged 14 to 18 must use it under adult supervision.
A moment of calm with KINGRAY BioWave
See BioWave in the photo and video and imagine your own moment of relaxation at home.
What you can expect from using it
Pleasant warmth
Thermal comfort during a calm, seated session.
A feeling of relaxation after exertion
A warming session may help create comfort and relaxation after an ordinary day.
Settings to suit your comfort
Choose the intensity and session length in accordance with the instructions. You do not have to use the device's maximum output; choose a recommended intensity that feels comfortable for you.
Perceptions of warmth and relaxation vary between individuals and also depend on the settings and your condition at the time. A particular sensation cannot be guaranteed.
BioWave technologies and how they work
A magnetic device in the form of an electromagnetic platform
Here, “magnet” refers to an electromagnetic system, not a permanent magnet. According to the manufacturer's description, the platform uses an electrically powered, regulated coil system that generates a changing magnetic field. The controller lets you set the session intensity.
Ease of use also matters when choosing a home magnetic device. BioWave has two surfaces for resting your feet and a raised panel where you can adjust the settings without standing up.
The manufacturer calls the coil technology PEMF. We present this as the manufacturer's declaration; on its own, it does not establish a specific pulse mode or dose in tissue. The articles below explain the relationships between magnetic fields, radiofrequency (RF) and heat generation.
Heated belt for local warmth
The set includes a belt with independently adjustable heating. Place it on the area specified in the instructions and select a comfortable level of warmth. Use the platform and belt separately or together according to the recommended adaptation procedure.
The belt provides local heating where it is applied. Its settings are controlled separately from the platform intensity.
Red and blue light for the feet
LED light is directed at the tops of the feet and complements the platform's features. Light colour alone does not determine the light dose or confirm therapeutic effects.
Why warmth is discussed in relation to microcirculation
Microcirculation is blood flow through the smallest vessels, which supply tissues with oxygen and nutrients. Local warming of the skin may temporarily increase blood flow in it. This is a natural response to heat; its extent depends on temperature, duration and the person's condition.
For home use, the aim is pleasant thermal comfort and relaxation. Our article about warmth through the feet explains the relationship between warmth and blood flow in more detail. Results from specific research procedures cannot automatically be applied to every device.
Relaxation and a break from everyday stress
Pleasant warmth and comfortable sitting can form part of a moment of rest after an ordinary day. A calm wellness routine gives you space to slow down and notice your own comfort.
We perceive warmth through skin receptors and nerve pathways. This explains heat perception; it is not a claim that BioWave treats diseases of the nervous system.
Make it part of the time you already set aside for yourself
After coming home, after a walk or during a quiet evening break. The device is used while seated, so you do not need a dedicated room or a trip to a salon. Before your first session, read the instructions, check that use is suitable for you and begin with the recommended initial setting.
Your evening can be yours too: comfortable sitting, pleasant warmth and a moment without rushing. Always choose the session length and settings according to the instructions. Do not fall asleep with the device switched on.
How to get started
- Read the instructions. Check the contraindications, recommended settings and time limits.
- Sit comfortably. Place your feet on the designated surfaces and start with the recommended initial setting.
- Get to know each part gradually. Use the platform and belt separately at first; only introduce combined use according to the adaptation procedure.
- Observe limits and breaks. Higher intensity or longer sessions are not the aim of use.
Try it and see how the session feels for you
Would you like to know what using it feels like or need the controls explained? Contact us to arrange an available demonstration or trial option. If you have already decided, you can order BioWave directly from the online shop.
Telephone: +421 914 150 909
Email: info@kingray.sk
What you get with the BioWave set
A foot platform with a control panel, a heated belt and integrated red and blue LED light. The KINGRAY team can help you in Slovak when choosing the device and getting started.
Answers before you buy
Is this a magnetic device for home use?
It is an electrically powered wellness device with a foot platform that the manufacturer describes as electromagnetic. A heated belt and LED light complete the set. It is not an ordinary permanent magnet.
What does the commercial term “terahertz” mean?
In this offer, it refers to a commercial category of devices. We do not use it as an indication of confirmed emission in the terahertz frequency band.
Is higher intensity always better?
No. Choose settings according to the instructions and your comfort. A stronger sensation or more heat is not in itself evidence of a greater benefit. The session should remain pleasant and within the recommended time limits.
Can I use it in the evening?
Yes, it can form part of evening relaxation when the instructions are followed. Do not fall asleep with the device switched on. BioWave is not intended to treat insomnia.
Can I use the platform and belt together straight away?
First, become familiar with each part separately. Only introduce combined use according to the adaptation procedure in the instructions and if you tolerate both parts well.
How can I arrange a trial?
Email us at info@kingray.sk or call +421 914 150 909. We will arrange an available demonstration or trial option with you.
How do returns work when buying online?
Before ordering, check the current return and withdrawal conditions on the “Online returns and complaints” page. It explains the deadline, procedure and rules for handling the product when trying it out.
Is it suitable for everyone?
No. Before purchasing, check the contraindications and safety instructions in the manual. Do not use it with a pacemaker or other implanted electronic device. If you have health problems or doubts about its suitability, consult a doctor.
Foot maps in traditional reflexology
Traditional reflexology depicts zones on the feet associated with different parts of the body. The following maps illustrate this traditional concept.
Illustrative diagrams of traditional reflexology. They are not anatomical maps of nerve connections or evidence that KINGRAY BioWave affects the organs shown. The maps are not intended for diagnosis or treatment.
Intended use and safety
BioWave is a wellness device for relaxation, not a medical device for diagnosing or treating diseases. Before purchasing, check the contraindications in the manual. Do not use it with a pacemaker or other implanted electronic device. If you have health problems or doubts about suitability, consult a doctor.
BioWave's non-medical intended purpose
KINGRAY BioWave is a non-medical wellness device intended for use at home on the feet. It is intended to provide pleasant foot warming, relaxation and a feeling of physical comfort after ordinary everyday exertion.
The device has no intended medical purpose. It is not intended to diagnose, prevent, monitor, treat or alleviate diseases or injuries. It is used in accordance with the manufacturer's instructions and the stated safety restrictions.
Use it only in accordance with the instructions, recommended breaks and safety guidance.
Who must not use the device?
According to the Slovak KINGRAY BioWave instructions, model KB-136C, revision 01, do not use the device in the following cases:
- A pacemaker or a metal implant in a lower limb. Also observe the above prohibition on use with other implanted electronic devices.
- Heart disease.
- Pregnancy or menstruation.
- Malignant disease, a bleeding disorder, infectious disease or an acute purulent infection.
- High fever, alcohol intoxication, hunger or overeating.
- Children under 14 years of age.
When is particular caution required?
People with reduced sensitivity to heat must be particularly careful and must not rely solely on their subjective sensation of warmth when assessing safety. If you have doubts about suitability, consult a doctor before purchasing.
Where must the heating belt not be used?
Do not use the belt on areas with acute inflammation, open wounds or pain of unknown origin. It is intended primarily for the abdominal area. When using it on the lower back, do not use it if you have spinal instability or osteoporosis.
When should use be stopped immediately?
If you experience pain, burning, dizziness, palpitations, unusual pressure, tingling or swelling, stop both INTENSITY and HEAT. If the controls do not respond, turn off the rear power switch. Do not use the device again that day. If symptoms are severe, recurrent or persistent, consult a doctor before further use.
New pain or swelling in one leg requires immediate medical assessment. In the event of sudden shortness of breath, chest pain or loss of consciousness, call 112. These are not normal signs of getting used to the device.
Basic rules for safe use
- Use while seated, with clean, dry, bare feet. Do not stand on the device with your full body weight.
- Stay awake. While output is active, do not touch your legs or feet with your hands and avoid contact with another person. Stop the output before changing the position of your feet.
- For the first three full weeks, use the platform and belt separately, using only one part on any given day. Introduce combined use no earlier than day 22, and only if both parts are well tolerated, in accordance with the instructions.
- Neither belt use nor combined use may exceed 30 minutes. The timer range of 5–60 minutes is not a recommendation for session length. Follow the adaptation procedure, limits and breaks in the instructions.
- Use only indoors in a dry environment, on a stable surface and with ventilation openings unobstructed. Do not immerse the device, operate it with wet hands or apply water, gels or cosmetics to the contact surfaces.
- Connect the device to a socket with protective earthing. Do not use a damaged device or cable. Do not look directly into the light sources at close range.
- Use the belt unfolded over a thin, dry layer of fabric; do not fold it, press it beneath your body or cover it with additional blankets. Check your skin.
- If there is smoke, sparking, a burning smell or liquid ingress, safely disconnect the device without waiting for it to cool down. Do not switch it on again; contact the service provider.
This overview does not replace the complete instructions supplied with the device. Read them before first use, including the procedures for switching on, settings, ending use, cleaning and maintenance.
Product identification and contact details
Product: KINGRAY BioWave · model KB-136C. A non-medical wellness device for home care of the feet and lower limbs, pleasant warming, relaxation after everyday exertion and support for physical comfort.
Power supply and consumption: 220–240 V~, 50 Hz / 300 W. Electrical protection: class I – protective earthing. Country of manufacture: China.
Manufacturer: Dongguan Kplai Electronic Technology Co., Ltd.
Room 101, Bldg 2, No. 90 Liwu Yanhe Rd., Qiaotou Town, Dongguan, Guangdong 523000, China
Email: ou@beirelax.com
Importer: Yalong Trade s.r.o.
M. Bodického 1517/14, 050 01 Revúca, Slovakia
Email: yalongtrade@gmail.com
Information and safety instructions according to the Slovak manual for model KB-136C, revision 01.

Warmth through the feet: blood flow, comfort and sleep
Warm feet, comfort and falling asleep can be connected. We explain heat transfer, the response of skin blood vessels and device settings. Research into physiology is distinguished from evidence about a particular device.

Radiofrequency for the feet: RF, warmth and research
What does RF mean, and how can electromagnetic energy become heat? We explain frequency, power, pulsed operation and the difference between research into a technology and evidence for a particular device.

PEMF for the feet: pulsed fields and study results
How is a pulsed electromagnetic field generated, and what can it induce in tissue? We explain induction, signal parameters and the difference between a laboratory finding and a result in people.














