... and all 5V device.Advantage1. Unique Design for Division of Appearance and Electric Circuit;2. ... instruction1. LED flashlight: Press the KEY for 2 seconds, the LED lights on, press it for another 2 seconds, ... ON/OFF switch function: On standby, short press the button, the lights indicate the remaining capacity ... indicator lights go off. When charging, short press the button, the indicator lights go off, ...