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