Customer Service?We provide detailed instructions; Yakry provides lifetime technical support, 2-year replacement service and 30-day money back guarantee for each rear camera system. 2 Video Input&Camera Bracket Hidden?Bluetooth backup camera system with 2 channels, means a second wireless back up camera. Backup Lines On/Off? Vehicle backup camera with DIY backup lines, guide lines can be adjusted by your need. A windshield mount for the reverse camera monitor is provided, which can be fixed on the dashboard or mounted on the windshield. Plug and Play?Wireless backup camera for trucks is easy to install. Just need to power for monitor and rear view camera separately. There is no wire between the monitor to the camera, saving complicated installation process and time compared to wired back up camera system. Stable Signal Transmission?Wireless backup camera system with digital signal provides excellent stability and real-time images and works up to 36 feet when reversing or driving. Without any interference and flicker.