The KB-702GM remote speaker station permits the user to select between two channels of partyline communications, with the ability to talk and/or listen on the selected channel, like the KB-702 but adds a gooseneck mic connector and VOX circuitry.Main Features: Gooseneck microphone connector with VOX circuitry Talk/Listen from headset mic, telephone handset or push-to-talk microphone Four modes of operation that are internally programmable via dip switches Balanced local program input with separate level control Visual and audible call signaling Optional 4-wire daughter board for flexibility Wall or console mountable, or optional V-Box for portable or desktop use Built-in speakerSpecifications:Panel Microphone Input: Input Type: Electret Input Impedance: >=2K Mic Limiter Threshold: -2dBu 3dB Mic Limiter Range: >= 15dBHeadset Microphone Input: Input Type: Dynamic Input Impedance: >= 1K Mic Limiter Threshold: -2dBu 3dB Mic Limiter Range: >= 15dBProgram Line Input: Maximum Level before Clipping: >= 20dBu Input Impedance: >= 5KHeadset Output: Load Impedance: >= 8 Output Impedance: <= 25 Output Limiter Threshold: +5dBu 3dB Maximum Output Level before Distortion: >= 17dBuSpeaker Output: Load Impedance: >= 4 Max Output Level before 1% Distortion: 20dBu 2dBuPartyline Output: Off Noise: < -74dBu Output Impedance: >10KPartyline Input: Crosstalk: < -60dB Max level before Clipping: >= 12dBu Sidetone Null Capability: > 25dBFrequency Response: Panel Mic Partyline: 300 16kHz 3dB Mic Partyline: 300 15kHz 3dB Program Input Headset Out: 200 18kHz 3dB Program Input Speaker Out: 200 18kHz 3dB Partyline- Headset Out: 200 18kHz 3dB Partyline- Speaker Out: 200 18kHz 3dBMax Distortion: Panel Mic Partyline: <= 0.5% Headset Mic Partyline: <= 0.5% Program Input Headset Out: <= 0.2% Program Input Speaker Out: <= 0.5% Partyline- Headset Out: <= 0.2% Partyline Speaker Out: <= 0.5%Noise: Panel Mic Partyline: < -65dBu Headset Mic Partyline: < -70dBu Program Input Headset Out: < -60dBu Program Input Speaker Out: < -60dBu Partyline Headset Out: < -50dBu Partyline- Speaker Out: < -50dBuMax Gain: Panel Mic Partyline: >= 37dB Headset Mic Partyline: 41dB 2dB Program Input Headset Out: >= 18dB Program Input Speaker Out: >= 24dB Partyline- Headset Out: >= 34dB Partyline- Speaker Out: >= 40dBPower: Input Voltage Range: 20-30V DC Input Current (Idle): <= 90mA Input Current (Max): <=110mAInternal Adjustments and Connections: Intercom: Line Five terminal connector Program Input: Three terminal connector Option Switches: Three DIP switches Call Signal Jumper 3: Three sets of options jumpers Call Alert Tone Level Control: Level adjustment controlEnvironmental: 32 122F (0 50C)Dimensions: 4.5 x 8.25 x 1.75in (HxWxD) (114 x 210 x 44mm)Weight: 1.1lbs (0.50kg)