Motorola XTS 3500 Portable Speaker Mic’s, Motorola Original Speaker Mic’s are built to withstand time. Battery Clearance carries a complete line of Motorola XTS 3500 Portable Speaker Mic’s. Battery Clearance carries a complete line of Remote Speaker Mics for Police, Fire and Military use. The most commonly used mic is the PMMN4045B noise canceling mic. Also available are the PMMN4051B, RMN5089B Commander with Emergency Man Down button and volume control and Channel Knob, RMN5038A with Emergency Button and Volume Control