NEW   Double-line PTT is adopted marvelous design, big PTT button on the front, easy to push. High quality acoustic tube convey voice make you have better sense of hearing, and comfortable wearing. Choosing suitable silicon eartip, offer us sound which is not interference around environment. Designing PTT with external PTT jack, match with super-thin finger (P04) PTT, operate flexibly. PU cable compliance with ROHS contain high intensity Kevlar is very firm and endurable. Waterproof Level: IP54   Microphone Type: Electret microphone Sensitivity: -40dB±3dB  at 1000Hz（0dB=1V/Pa） Resistance: 2.2KOhm
  Speaker OD: Φ16mm Resistance: 90Ohm±15%  at 1000Hz Sound Pressure Level: 90dB±3dB  at 1000Hz Rated Power: 100mW Max Power: 200mW