And excellent entry-level microphone for your DM-RTA and the official 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-3052A, SA-3055, A-3056, Iasys and Iasys HT. This is a back electret measurement microphone with calibrated internal preamp. Maximum SPL is 136 dB. Ships with 20 foot XLR mic cable.