The Model MT-2B 2-Channel Block Coded Visor Transmitter is designed for use with Linear's access control products. The Model MT-2B is a two-channel device. Pressing the left button on the transmitter will send a channel one signal. Pressing the right button on the transmitter will send a channel two signal.
2 CHNL BLOCK CDED HANDHELD TX, Nortek Security & Control LLC ADI, Linear PRO Access