Material: ABS Battery capacity: 400mAH Working gear: 1-8 gears Charging time: 2 hours Usage time: can be used 8 to 10 times after a full charge, 15 minutes each time Output voltage: 3.7V Maximum power: 7W Quiescent current: 100uA Product size: about 17x11x50cm Folded size: about 13x6cm Function and use: The V-shaped angle is adjustable from 26 to 75 degrees, and the six functions are adjustable from 1 to 8 levels. 1Smart mode 2 massage modes 3 tapping modes 4 kneading modes 5 acupuncture modes Red and blue light Red light 630nm Blue light 470nm Adjust the headband and wear it at the chin position so that the surface fits the V-shape of the product. Press and hold the on/off key for 3 seconds to turn on the phone. Short press to select mode. The default gear is 1. Short press the +/- button to adjust the strength, 1-8 levels are adjustable. Press and hold the power button to turn off the machine. Timing function: Automatically shut down 15 minutes after turning on.