ROA system uses open type ultrasonic sensor. The product is installed on the top of vehicle, and detects moving objects with ultrasonic range detection principle.Open-type sensors are classified into 3 types: transmitter, reciever. It features wide measuring range and strong anti-interference ability. Open type sensors are mainly used in car alarm devices, distance measuring device and remote control system.

• Can measure obstacle with different shape and material
• Cannot be influenced by ambient light
• Has a large measuring range