The EG360 Retro-Reflective Photo-eye is designed to provide vehicular entrapment protection for gates, barriers and overhead doors. The EG360 uses an infrared beam that is returned from a reflector mounted on the opposite side of the opening that detects vehicles in the path of the beam. The EG360 Retro-Reflective Photo-eye is intended for the use with operators designed to accept a “Heartbeat” form of monitoring but can be used with an operator’s simple relay contact activation for monitoring to comply with the UL 325 standard. It can also be used as a normally open non-monitored detection device for vehicular protection. Max sensing range: 50ft (15m)/Outdoors Power Input: AC (60Hz)/DC 12-30V Current: 120mA Operating Temperature: -4 degrees F-131 degrees F (-20C-55C)