Williams Sound MIC 014-R plug Mount Microphone; Can be used with PockeTalker, DigiWave DLT transceivers or T2863 FM Transmitter; 3.5mm mono plug; Omnidirectional condenser Can be used with PockeTalker, DigiWave DLT transceivers or T2863 FM Transmitter 3.5mm mono plug, Omnidirectional condenser Sensitivity -42 dB  3 dB, Frequency Range 20 Hz - 16 kHz Output Impedance 2.2 k, Standard Operation Range 2 - 10 V DC Signal-to-Noise Ratio &gt;58 dB, Electret Condenser Element