Lifetime After-Sales Support ?VSYSTO is a remarkable company and believes in driving innovation to add value for our customers. We offer lifetime after-sales support for this 3ch semi truck dash camera. If you have any questions about this dash cam recorder, please contact our customer service team. ?Smart WiFi Connection and Convenient Power Supply?Enhance your driving experience with the built-in WiFi and free app, allowing you to connect the dashcam to your smartphone effortlessly. Simply plug the device into your vehicle's cigarette lighter power socket to convert the 9~24V DC power source to a 5V/2A supply for the DVR. It's the perfect addition for all types of vehicles, including cars, trucks, vans, trailers, buses, and more. ?Wireless Control and Auto-Triggered Camera Switch?Connect the yellow wire of the separated cameras to the turning or reverse trigger wire of your vehicle, this will enable the monitor to display the corresponding cameras automatically when the turning or reversing signal is detected. Alternatively, you can also easily switch between camera displays manually using the attached 2.4G wireless remote, giving you full control at your fingertips. ?Loop Recording & G-Sensor?This dashboard camera supports up to a maximum of 256GB MicroSD card. With loop recording enabled, you have the flexibility to choose between 1, 3, or 5-minute video files. Once the memory card is full, the oldest video file will be overwritten automatically for continuous recording. In case of a collision, the built-in G-Sensor will activate the dash cam's emergency mode. All video files recorded during emergency mode will be protected from being overwritten. ?IP67 Waterproof and Infrared Night Vision? The truck recorder features IP67 waterproof resistance lenses, ensuring optimal functionality in any weather conditions. The built-in 4 pieces of IR LED lights provide reliable infrared night vision, enabling you to capture clear images even in low-light environments. ?3 Cameras Recording & 1/2/3 Split Screen?The T3 truck dash cam allows for simultaneous recording from three different angles. One 1080P camera for front, and the other 2 separated 720P cameras for side or rear view, you can easily monitor your truck's surroundings. Truck monitoring split-screen modes can be switched to either single full view or multi-split screen(up to 3).