Linear 1-Channel Block Coded Key Ring Transmitter | LIN-ACT-31B liftmaster K74-30763 This high-quality sprocket is designed

This high-quality sprocket is designed to provide smooth and efficient operation for your garage door system

Worm Gear Reduction Precision machined all-metal gear drive

Rugged cast aluminum housing

Multiple interfaces (infrared

monitored photo eye

Linear 1-Channel Block Coded Key Ring Transmitter | LIN-ACT-31B liftmaster K74-30763 This high-quality sprocket is designedLinear 1 Channel Block Coded Key Ring Transmitter LIN ACT 31B Designed for use with Linears access control products. The Model ACT 31B is a single channel device supplied with a quick disconnect key ring. Also included are lithium batteries with five year service life. A unique 10 second time out feature prevents the system from being shut down by a single transmitter transmitting continuously. The transmitter is MegaCode format, which means each