– Transmitter Type: ET – Carbon Compatible Electret element designed into a amplified circuit to act as a Carbon without variations
– Output Level: -23 dBV
– Output Impedance: 20
– Output Minimum (-20 dBV drive): 96 dBSPL
– Input Impedance: 150 Ohm
– Amplitude Limiting: 124 dBSPL
– Receive distortion: less than 5%
– Compatible with hearing aids
– PTT handsets do not require a hook switch in cradle
– G-Style / 500-Style Round Receiver & Transmitter Ends
– Connector: 4 conductor modular jack (RJ22)
– Compatible with Cortelco 2500 and 2554 series telephones