Headset for Aastra 6730i, 6731i, 6735i, 6737i, 6739i, 6753i & 6755i IP Phone
Earphone Speaker Specification. The fixed microphone boom adjusts freely to any position, and is longer than non-pro headsets. Microphone Specification. Transducer: Electorate condenser microphone. Transducer: Moving Coil Dynamic Speaker.