Q-RM9012 is a remote microphone used in conjunction with 9000M2 Series Mixer Amplifiers or other paging equipment. Output is up to 12 contact closures together with balanced audio signal inorder to initiate / terminate the paging. This unit requires DC 24V power supply. Power Source: 24 V DC from AC adaptor AD-246 or the equivalent Power Consumption: 80mA or less Audio Output: 0 dB*, 600Ω transformer balanced, RJ45 connector Distortion: 1% or less Frequency Response: 100-20,000Hz S/N Ratio: 60dB or more Microphone: Unidirectional electret condenser microphone Control Output: 12 channels, open collector output, withstand voltage: 27V DC, control current: max. 50 mA, (2) RJ45 connectors Number of Keys: 12 zone selection keys, all call key, cancel key, talk key Volume Control: Microphone volume control Operating Temperature: -10°C to +40°C (14°F to 104°F) Finish: ABS resin, black Dimensions: 190 (W) x 76.5 (H) x 215 (D) mm (7.48" x 3.01" x 8.46") (Gooseneck microphone excluded) Weight: 750g (1.65 lbs) Option: AC- Adaptor: AD-246