Dear buyers, this driving camera only works when you charge it. It won't work without charging. If you need 24 hours parking function, please buy the set with bucklineProduct parameters:Power cord length: 3.5mRear camera line length: 6 mColour: BlackSize: 11.1cm * 5.8cm * 1.29cm / 4.4in * 2.3in * 0.51inLCD screen size: 4.0inFile format: MOVTouch screen function: supportParking monitoring: supportCircular recording: supportMotion detection: supportMemory card: TF (up to 32GB)Photo format: JPEGBuilt-in audio: supportCurrent frequency: 50 / 60HzUSB function: 1: USB-Disk, 2: PC-CameraOn-board switch: support auto ignition start, shutdown and shutdownPower interface: 5V 1.2-2ABattery: Built-in 300mAhVideo resolution: front (1920 * 1080P) and rear (1280 * 720P)Reminders:1) Be sure to format new SD cards in the DVR MENU settings, not on a computer.2) Be sure to use high-speed Class 10 memory cards, as others will indicate a full status if incompatible.3) Only use it with out original charger. Do not use other car chargers.