Enhance the security of your commercial garage with the LiftMaster CPS-RPEN4 Monitored Retro-Reflective Photo Eye. Designed for LiftMaster brand and compatible with LiftMaster openers, this door monitor is a must-have for ensuring the safety of your garage. With a voltage of 24V and made of high-quality aluminum, plastic, and metal materials, this photo eye is durable and reliable.