When you receive the laser acupuncture pen , you only need swtich the key to the green point, then press the key , the laser acupuncture pen will working.
About how to use that, we should send you the treatment procotol .
There is a key at end of the laser acupuncture pen, please switch the key to the green point, if the key at the red point, it means the laser acupuncture pen is locked.
2. If you switch to the green point , and it is still no working , please change the battery + and - ， it will working.
If it is still not working, please kindly check as the following steps
