YJT Red Light Therapy Device for Pain Relief, Joint and Muscle Pain Reliever, Infrared Light with 650nm and 808nm (Two*808nm) (Black)

Portable & Convenient Operation: Small size and handheld, specially design for household use. More detail information please see the product manual which in the package box. A rechargeable 2600mAh lithium battery inside, when fully charged for 2 hours, its duration time reach 4 days. Turn On: Long press the ON/OFF button (hold for 3 seconds) to turn on the device and click again to start. Please note there is a layer of film on the display screen in order to protect the display screen.