1. In order to optimize your camera's work, use high-quality mobile , mobile needs to output 5 volts 2A / 4A current. When the or current is insufficient, you can't . Please choose at least better current.2. The mobile has an automatic sleep mode and is turned off.3. Do not use computer USB, because the computer USB 2.0 output voltage is mostly 5v, but the current is less than 500mA current.4. Some mobile phone/ USB charger and recognizer, do not know the camera, the current can not meet the requirements, so it is not recommended.5. Use the camera for a long time to set the camera standby time to the maximum standby time.Input: 5 V-2A-4AOutput: 8.4VUSB plug specification: USB2. 0colour:BlackMaterial:plasticsize:Cable length about: 180cmPackage Contents:1 x USB cable1 x -E6 battery caseOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.