Replacement calibrated microphone for all models of the SA-305X and the Iasys. Models include the SA-3050, SA-3050A, SA-3051, SA-3052, SA-3055, Iasys and Iasys HT. This is a back electret measurement microphone with calibrated internal preamp. Microphones may be interchanged with different analyzer units. Maximum SPL is 135 dB. Ships complete with 20 foot XLR mic cable and zippered storage bag.