... on or off, just press the battery indicator button, you will know how much battery power left ETHINK 3G WIFI Router + Power ... 1 x 5200mAh Portable 2 in 1 Mobile Power Bank Battery 3G Wireless Router 1 x USB Cable 1 x User ... Manual Specification Power Bank 5200mAh Li-polymer battery Input 5V 1A Output 5V 1A Charge Times >500 ...