Motorola OEM Speaker Microphone with Noise Cancelling AAHMN9053E HMN9053E HMN9053 Compatible with HT750, HT1250, HT1550, MTX850, MTX1850, MTX8250, MTX950, MTX9250, PR860, PRO 5150 Compatible with HT750, HT1250, HT1550, MTX850, MTX1850, MTX8250, MTX950, MTX9250, PR860, PRO 5150 3.5mm unthreaded jack on the head of the microphone Noise cancelling!