4G networkThe device supports 4G sim card, allowing your dvr to surf the Internet anytime, anywhere.Before you order this car dvr, please check clearly if your SIM card can meet the following network frequency bands.Support 4G mobile network. Network frequency band:(4G/LTE:FDD,2100(B1)/1800(B3) GSM:900(B8)/1800(B3)Front vehicle motion alarmAn alarm is triggered when the vehicle in front of you moves according to the live video camera.Dual channel recorderThe device comes with two wide-angle cameras that can be used on the front and rear of the vehicle.Front 1920*1080P, rear 1280*720P; two high-definition cameras can record at the same time, automatically capturing every fleeting moment.Auto reverse parking viewWhen the car is in reverse gear, this vehicle DVR will automatically switch to the reversing camera image view and the parking lineWIFI functionBuilt-in Wi-Fi lets you stay connected and surf the web quickly wherever you are. GPS maps, movies, music and apps can be pre-downloaded when free WiFi is available.In addition to the car DVR connected to WIFI, when the car DVR is connected to the Internet through a 4G sim card, it can also become a WIFI hotspot for your other devices.24 hours parking monitoringWhen your car or someone near your vehicle starts to move, automatically turn on and start recording when any impact or collision is detected, the device will automatically record for a few seconds, ensuring 24-hour parking protection.Package includes OBD buck lineNote: Please use the original charger. Using other chargers may cause the device's screen to turn off and the rear-view camera to be temporarily unavailable. In fact, the voltage supplied by the original charger may cause the device to behave abnormally. Please use the attached charger. Once the charger is connected to the car to power the device, it is ready for normal use.Welcome to my shopIf you have