Details Interfaces any 2-way radio to a single channel of Clear-Com, RTS or compatible system Accepts any walkie-talkie or radio with headset and microphone jacks Individual transmit and receive level controls Bi-color LED audio level indicator Powered by the intercom line Item Code TW-47 Technical Specifications Radio to Partyline Line Characteristics Frequency Response: 200-20kHz ± 3dB Max Gain: >=-5dBu Distortion: <=0.3% Noise: <=-70dBu Max Level Before Clipping: >=+17dBu Green LED Threshold: -22dBu ± 3dB Red LED Threshold: -16dBu ± 3dB Input Impedance: 400O ± 100O Partyline to Radio Line Characteristics Frequency Response: 200-8kHz ± 3dB Max Gain J7 ON, J8 ON: -12dBu ± 3dB Max Gain J7 OFF, J8 ON: +2dBu ± 3dB Max Gain J7 OFF, J8 OFF: +27dBu ± 3dB Distortion: <=0.3% Noise: <=-50dBu Max Level Before Clipping: >=0dBu Power Requirements Input Voltage Range: 20-30V DC Quiescent Current: <=40mA Current with Audio: <=50mA Current with Call: <=60mA Dimensions 1.8 x 3.95 x 6.4in (HxWxD) (46 mm x 100 mm x 163mm) Weight 1.3lbs (0.6kg)