1. Connection. ADJUSTMENT. Usage: No battery can be charged. It works only when hanging. Power UPS: Insert to any USB ports. Long press --- Open or closed. Short press --- Switch mode. Timer: automatically closed after 20 minutes. Use 3 times a day for 15-20. See early results in 3 weeks. Note - Press and press the keys for the addition of power for use and to open/close the 2s. Red and infrared hand wrist winding belt hand wrists helps finger discomfort. Each LED consists of 1 red light (660nm) and close infrared light (850nm) diodes. 3 Option Mode - density red and infrared light, 50% density red and infrared light, 10 pulses + 660nm and 850nm. It can be twisted after 20 minutes and the flexible hand wrist winding automatically closed. Luxury -graded crystal fluffy inner primer, more binding and comfortable.