ALEKO LM179 is suitable for doors, gates, or other exit automation control systems. Featured with infrared technology, touch free, more convenient to use. Stainless steel plate very durable to us, It is easy to install and convenient to use. FEATURES: – Activate without touching; – Perfect for hospitals and restaurants; – Stainless steel faceplate. SPECIFICATION: – IP protection: IP55; – Relay Switch Type: NO/NC/COM; – Contact rating: 3A , AC 120V / DC 30V; – Input voltage: DC12V; – Working temperature: -4 ~ 122 F (-20 ~ +50 C); – Response Range: 4 inches (10 cm); – LED Indication, sensor standby: blue – LED on, visitors approaching: red LED on; – Item Size: 2.5 in x 4.5 in x 1.5 in (11.3*6.9*3.9 cm); Compatible with gate opener models: ALEKO AR1450, AR1550, AR1850, AR2050, AR2750, AR5700, AC1400, AC1500, AC1800, AC2000, AC2000, AC2700, AC5700 Note: The gate opener should have a 12V DC output as the power supply for the exit switch.