Features:-- Dual Photobeam Reflective-- AC/DC 12/24V 5 meters / 20ts detection sensor distance-- Widely used for sliding gate and garage door safety protection-- Reflective infrared sensor-- Relay output for gate opener safety detection input-- Through-beam, detect distance: 5m (20fts) / Retro-reflective;-- Light resource: Infrared LED -- Strong anti-shock and anti-vibration. -- Non-contact object detect: Avoid the photoelectric sensor to contact the object directly, protect the inducing component from damage and extend the operation life of the sensor. -- Detect any objects with different materials: Detect objects by the light quantities reflected and received, detect objects such as glass, metal, plastic, wood, fluid, etc...-- Fast response: Max. 3ms -- Identify object colors: According to the colors' reflective and absorptive, the sensors detect the light that the object reflected and identify the colors. -- High precision: Precise electron circuit, can detect tiny objects with accurate position.-- Obstacle avoidance compatible.