4K Screen & 4 1080P Backup Cameras: With the 10.36 inch 4K ultra HD 4-split touch screen & 4 pcs of 1080P Full HD camera, you can get sharper, cleaner and more vivid view on road to get the ultimate travel pleasure Built-in Bluetooth: With Bluetooth function, the VOONOA RV camera system enables you to connect your cellphone iPhone to the monitor to play music and answer calls. Release your hands, focus on driving, and reduce driving risks Great Night Vision View: Adopting the latest infrared LED lights & light sensor, the VOONOA backup cameras & side view cameras can provide you with at least 50 feet of night vision even in In complete darkness IP69K Waterproof: Using full-glue sealing technology for cameras & adding waterproof covers for all connections, the VOONOA truck system can work normally in various extreme bad weathers Built-in DVR & Loop Recording: The DVR recording function enables you to record videos from 4 channels and can automatically save video in the event of a