The Model 308301 2-Channel Key Ring Transmitter is a miniature style transmitter designed for automatic door and gate operator applications.

This transmitter 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. The buttons feature raised dimples for easy, or vision-impaired identification. The transmitter has a red test/operate indicator and is powered by a 12-volt battery. A molded-in hole in the case is for attaching the transmitter to a key ring.

The transmitter is Multi-Code format with two 10-position coding switches providing 1,024 possible codes for each channel. Independent coding supports activation of a common gate and a private door. The transmitter will only activate receivers set with the same code.

The Model 308301 is compatible with 300 MHz Multi-Code receivers and Model 109950 and 302850 receivers.