.125″ O.D. X .023 Wall-Black | Service Part | Hardware

Features: NOT Disposable battery, the glasses are featured with built-in rechargeable 180mAh Li-ion battery, Comes with one USB cable (5V/ 1A) to charge the glasses, can be charged by adapter, power-bank, computer, laptop. The red light will keep lighting when being charged, turn off when fully charged.