Linear DXT21 2-Button, 1-Channel Handheld Transmitter, 315 MHZ, 1.6" Width, 4.2" Height

The Model DXT-21 2-Button, 1-Channel Handheld Transmitter is a battery powered portable transmitter designed for use with Linear’s DX Format receivers. Each transmitter can be used in a limitless number of wireless remote control applications. Pressing a button on the transmitter sends a digitally coded wireless signal to its companion receiver, The DXT-21 is a two-button, one-code transmitter. Pressing either the round button on the transmitter’s front, or the small button on the transmitter’s top will send the same signal.