🚚【4CH 1080P RV Camera System】Front/Right/Left/Rear 4 channel simultaneous recording cameras give you 360 panoramic recording, helping you avoid the blinds spots efficiently to improve driving safety and their 1080P high resolution delivers a more colorful and delicate image. And the 7 inch monitor can switch single screen, two split/four split mode..🚚【Infrared Star Night Vision & Waterproof】IP67 Waterproof truck camera system with IR CUT technology capture clear images and videos at night, providing you with the best night vision and making your driving safety in the dark. Features high/low temperature resistance (-10℉-65℉), Waterproof IP67, works perfectly in any extreme weather..🚚【Precise Speed Tracking GPS Module】The included GPS module allows you to playback the video with the route, speed, and location on Google Maps via our Windows and Mac compatible GPS player, which make sure the speed evidence is protected when an accident occurs..🚚 【 Loop Recording & Emergency Accident Locks】The 4 camera dash cam auto overwrites the old footage with new recording when the card is full. While the high sensitivity G-sensor detects a crash, the video of the current accident will be locked and saved automatically into event folder. That ensures important evidence is well protected without overwriting..🚚【Compatible & Auto Power on/off with Vehicle Ignition】7inch large monitor system for RV truck box truck semi truck Trailer travel trailer bus heavy duty camper tractor, the 5th Wheel, Motor homes. Power supply: 12-24V DC. The dash cam's power is supplied by truck directly. The DVR starts automatically with the key ignition and turns off once the vehicle is not being used..🚚【Support up to 256GB (256GB*2)】Micro SD card(not include), it can hold roughly 20 hours of all 4CH camera videos without overwriting. And it will keep continuously recording of 1/3/5 minutes clips by overwriting the oldest files once the card is full. (Note: It has high requirement for SD card speed. Please choose good quality SD Card.).⭐【Lifetime after-sales support 】VSYSTO is a remarkable company and believes in driving innovations to add value to our customers. We offer lifetime after-sales support for this 4ch truck dash cam, 7*24 hours technical support. If you have any queries of this dashcam, please reach our customer service team .