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1) Double function: It's not only a masseur but also a flashlight for emergncy
2) PC Two way power: You would use two batteries, or use the computer USB interface to charge, which are suitable for all PC and mobile PC.
3) Thanks to its mini size and easily-handle, it's first choice for veteran computer operator. Comprising a handle and granules, the massge machion shake 4000 times per min, bring you comfortable feeling and release body from tire.
4) Max current is 200MA and USB with 2 meters wire, you could put it anyway you like