How to use: 1, put on the mirror, adjust the elastic band to feel comfortable; 2, ordinary type instrument according to the first time after the key to 8 times per minute automatically flip, press the second time to 16 times per minute automatically flip; reinforced type instrument according to the first time after the key to 5 times per minute automatically flip, press the second time to 10 times per minute flip, press the third time to 15 times flip, press the fourth time to 20 times flip, press the fifth time to 25 times per minute. 3, look at about 1,000px in front of the E sight and say the direction, or read, write about 15 minutes, the bell will end; 4, 1 ~ 3 times a day training; 15 minutes each time, can also add a 30 minutes of intensive training, the power automatically shut off. If you need to terminate midway, you can long press the key for about 5 seconds, let go of the power off.