The Model 308911 1-Channel Visor Transmitter is a poratble transmitter designed for automatic door and gate operator applications. Description The Model 308911 1-Channel Visor Transmitter is a poratble transmitter designed for automatic door and gate operator applications. This transmitter is a single-channel device, pressing the pushbutton will send a signal to the receiver. The transmitter has a red test/operate indicator and is powered by a 9-volt battery. A visor clip is included. The transmitter is Multi-Code format with one 10-position coding switch providing 1,024 possible codes. The transmitter will only activate receivers set with the same code. The Model 308911 is compatible with 300 MHz Multi-Code receivers and Nice/Linear Model 109950 and 302850 receivers. Features Compatible with 300 MHz Multi-Code receivers Supplied with visor clip Easy access to battery and coding switches Power: 9-volt battery Codes: 1,024 (set by dip switches) RF frequency: 300 MHz Dimensions: 2.5″ W x 3.75″ H x 0.875″ D Resources Installation Manual Literature