Dual Camera Lens The 4G Dual-Camera Dash Cam with GPS Tracker features an integrated road-facing camera and a detachable cabin-facing camera that records the cab, enabling you to simultaneously monitor the road ahead and the situation in the cabin. Simultaneous Live tracking and Video capture Driving Behavior Monitoring Leveraging data on the driving behavior of your drivers, including harsh acceleration, harsh braking, and sharp turn will help reduce accident rate and improve fuel economy of your fleet. Event Video to Cloud In the event of a serious accident, collision or improper driving behavior, the JC400D will, as required, capture event videos and send them to the cloud for storage. With a 4G connection, you can have faster data speeds and wider network coverage, enabling you to respond or take action immediately. Panic Button In the event of an accident or other emergency, one-press of the panic SOS will trigger the device to help the driver or passenger initiate an emergency call to pre-set SOS numbers and the back office until the call is answered and to flag important video footage for review. The external SOS button can be installed within easy reach of the driver or passenger for quick activation, giving peace of mind to all. Do-it-yourself Installation The detachable cabin-facing camera supplied in the JC400 packing list is easy enough to install and use. No need to pay a fortune for professional mechanic, you can install it yourself on the windshield or place it directly on the dashboard or anywhere you like.