AAHMN9054: UHF Public Safety Speaker Microphone (includes UHF antenna, swivel clip, volume toggle switch, and 3.5mm earpiece jack)
Public safety speaker microphones are specially designed to help cancel ambient noise during transmission. Coverage is increased with included UHF antenna (450-470 MHz) Technical Data: THIS ITEM IS INTRINSICALLY SAFE ONLY WITH FOLLOWING RADIOS: HT750, HT1250, HT1250•LS, HT1250•LS+, HT1550•XLS
NOTE: This item has been discontinued by Motorola. The direct replacement is RMN5075.