Development Products UHF transmitters SM25

Miniature UHF transmitter for use in a room or vehicle. It will transmit conversations to a distant receiver. With our Automatic Gain Control system it will pick up a whisper 40 feet away from the transmitter microphone as clearly as loud speech near it. Exceptional audio quality. Features Ultra miniature size. DL2450 Lithium battery. Shock resistant indestructible design. Extremely sensitive built-in microphone. Automatic microphone gain control. Crystal frequency control. Technical data Size: 25x25x3.5mm (1"x1"x0.14") without battery 25x25x8.5mm (1"x1"x0.34") including battery Range: 500 meters (1700 feet) in open field 200 meters (700 feet) in a city Power requirement: 1.8 - 3 V Battery type: DL2450 (CR2450 compatible) Battery lifetime: 50 hours Output power: 5 mW (0.1 - 50 mW on demand) Frequency: 433 - 434 MHz (300 - 916 MHz on demand) Modulation type: NFM Operating temperature: -20 to +60