SPLIT SCREEN FUNCTION 6 Selectable Viewing Modes: Single Full View / Split Dual Video View / Split Triple Video View / Quad Four View. And the split triple vide view has three viewing modes. Memory function when powered off. After powered on, the picture remains the last viewing mode set before, it's time-saving and more convenient. HD 1/3 CCD IMAGE CHIP 1/3" CCD image sensor, effective pixel: PAL:752(H)×582(V), horizontal Resolution: 600TV Lines. CCD image sensor have higher quality and more pixels, it provides crisp, smooth and wide footage, even in night. CONNECT UP TO 4 CAMERAS Exclusive Design: you can view 4 cameras at one time. AV1/AV2/AV3/AV4 with trigger wire, once trigger wire activated, image automatically switchover to corresponding camera. HD ALL GLASS LENS F2.8 all Glass, 150° Free viewing angle, for cameras greatly enhances night vision inside car at low light environment, making your driving more safer at night. When cameras at high or low temperatures, plastic lens will deform, the image becomes blurred, but glass lens will not. Read more WATERPROOF FUNCTION All cameras are industrial waterproof design, IP69K level. Compact, lightweight and easy to use waterproof camera. You absolutely no need to worry about water, fog or mist inside. HEAVY & STRONG HOUSING High Hardness Aluminum Shell, thickened outer casing, sturdy construction. All cameras' shell are made from high hardness aluminum, 100% Waterproof IP69K Rating and 10G Vibration. Those cameras are perfect for all kinds of HEAVY VEHICLE. NIGHT VISION Cameras have some infrared LEDs, with the Revolutionary Super Night Vision Technology, you can see up to 50 feet and capture clearer videos and photos even in low-light night conditions. Infrared LEDs through one light sensor to control themselves on and off. N/B: No worry in fully dark environment! APPLICABE VEHICLE Designed for Truck/Trailers/5th wheel/Campers/Semi truck/hitch hotel/box truck/Motorhome/cam/ Caravan/Boat Yacht /Vehicle use 12 to 32 Volt Systems. Used for Parking, Reversing, Truck Docking, Driving Safety. Read more OPTIONAL We also provide customized products to meet your requirements. Customized items must be shipped by our company. We provide the following special requirements: The built-in speaker monitors. Since the speaker only supports one audio input, we recommend using the AV2 channel as the audio input. Square cameras with audio output are available. Warm Tips: The side camera (Semicircular camera) cannot support audio output. Provide metal bracket with adhesive for the monitor. We also provide 4PIN cables in 5m(16ft), 10m(32ft), 20m(65ft), 25m(82ft) and 30m(98ft) lengths. Read more