The TE-BSM2 is mounted entirely inside the vehicle with one sensor mounted on the rear windshield, providing a clean and easy installation that eliminates the need for bumper removal.Unlike other systems, everything is built into a single sensor for an easy DIY installation, with no additional control modules or parts needed. This system provides both audible and visual alerts for rear blind spot detection within a 65.5 foot field. An LED visual-only alert is shown if there is a vehicle in the blind spot and then the visual and audible alert is triggered if the blinker is on, and a vehicle is in the blind spot, alerting the driver immediately.