digitsea 1.5" HD 1080P Dash Cam Mini Car Truck DVR Blackbox 0801 5M CMOS + 8GB Memory Card /Wide Angle View /HDMI interface/dual usb car truck charger 12V-24V input/10feet mini usb cable 1.On Start Up Recording: this dash cam will start and record automatically when start your vehicle, and will turn off about 1minute (configured by auto power off function) later after you turn off the engine. 2.Loop Recording: When the storage space is full, it can automatically cover the earlier segment. 3.Motion detection: When an impact, emergency brake occurred or the car tilted, it will protect the previous, present and next video files automatically. Through this function the important files won't be removed by loop recording. 4.10 feet cable: extend your car dvr DC power to the rearview mirror. Make your front window simple and clean. 5. Extra usb port:Charge your car dvr and cellphone simultaneously.