Anti-rolling and anti-broken. Very durable to use Smart LED display of remaining power. Build-in flashlight for low light use Our patented products are approved CE,RoHS,FCC certificated. Designed to provide power for your Phone and micro-USB charged phones. Protect Function: Short Circuit, Over-current, Over-charging, Over-discharging Joyroom Powerbank 20000mAh Power Bank Lcd Display