Built-in Recorder Wireless Backup Camera, High-Speed Observation System-No Interference, Camera Wireless Signal Can Stay Smooth and Clear Even Car Speeds Up To 75mile. This Rear View Camera with Monitor can Working on vehicle range under 60ft. Rear View Camera with Advanced Wireless Technology No Signal Lost No Picture Lost as First Released Wireless Set, No Interference. Digital Stable Signal Observation System Help You Reversing Safety. Upgraded stable long range wireless signal can stay smooth and clear even car speeds up to 75Mile, the image wont happened delay within 100m/328ft after our testing. IP69 Level Waterproof Backing up Camera with You Even in Bad Weather Condition With Special 16 IR LED Lights Design Which Can offer the Best Rearview Angel Compare With the Other Models.