Motorola PMLN5271A D-shell Earpiece Earphone In-line PTT & Mic MTH800 CEP400 etc
MTP850, MTS850, CEP400. MTH800, MTP810, MTP830. Motorola Large D-shell Personal Handsfree Kit with in-line PTT & Microphone, 2.5mm Jack. PTT Life Cycle: 200,000 full travel operation cycles. Distortion (THD): < 5% at 1 kHz at rated audio.