Easy to use and powered by USB (no battery, not rechargeable). The device only works when connected. Simply plug into any USB port. Long press to turn on or off. Short press to switch mode. Auto timer shuts off after 20 minutes. Use 15-20 minutes, 3 times a day. Results are visible after 3 weeks. Relief for overstrained hands and wrists. The infrared wrist wrap combines gentle warming, red light and near-infrared light therapy to promote blood circulation and stimulate tissue cell regeneration for faster recovery. Warm LED rotlight for the wrist: 96 pieces 660 nm red lights relieve wrist fatigue and pain, improve blood circulation and relax the muscles. 96 pieces 850 nm near-infrared lights penetrate deep into tissue and are ideal for wrist muscle recovery and bone growth, reducing inflammation and wrist pain. Enjoy comfort at home or on the go. The USB-C port allows use near a socket at home or on the go via an external battery. Voltage: DC 5V 2A. Compatible with most power sources. Advanced design for comfortable use. The design adapts to the wrist curvature, and the thumb hole ensures stable fixation. Velvet materials are soft and breathable. Adjustable Velcro closure and two expansion straps adapt to different body areas. Safe and natural solution. Doctor recommended and safe with no side effects. Relieves pain, relaxes muscles and is ideal for hand problems caused by work, sports and health. A great gift idea for families and friends.