ACT-21A - 1-Channel Key Ring Transmitter

***Sold in multiples of 10 only***

The Linear ACT-21A 1-Channel Key Ring Transmitter is designed for use with Linear access control products. The Linear ACT-21A is a single-channel device supplied with a quick-disconnect key ring. Also included are lithium batteries with a five-year service life. A unique 10-second timeout feature prevents the system from being shut down by a single transmitter transmitting continuously.

The Linear ACT-21A transmitter is MegaCode format, which means each transmitter is factory preprogrammed with one of over 1,000,000 codes, virtually eliminating the possibility of code duplication. Because the receiver ”learns” each specific code, no unauthorized person can gain access to the system by reprogramming a transmitter.