4K FULL HD Touchscreen RV Backup Camera System: Upgrade with 4K resolution IPS panel touchscreen monitorresponsive,accurate color,large viewing angle. The monitor does not appear off-color or distorted when viewed from any angle. Four 1080P HD rear side view cameras for super realistic images filled with exquisite detail and natural color. Bluetooth & USB Disk: Connect the mobile phone Bluetooth, the monitor comes with its own tweeter Speaker, you can play music, built-in microphone for answer calls, avoid holding the phone, reduce driving risks. With the included 32G-USB flash drive, also can play your favorite movies,MV,music and so on.