U94 PTT 7.1mm Tactical Telescopic Throat Controlled Walkie Talkie Headset For Motorola GP88S GP300 A8 12 Radio 2 Pin M Earphone 1. The transparent air duct uses the air to transmit the sound very original and clear. The air duct is easy to conceal, and the air duct transmits signals to reduce noise. With the U94PTT, the buttons feel good, and the large PTT is easy to operate. 2. Bracket type throat vibration noise reduction earphones, avant-garde engineering design, easy to shrink and wear, the coil can be adjusted in size, and the size can be adjusted according to the adaptation of the neck, the throat vibrates the sound, and it is highly noise-proof even in very noisy and harsh environments. Surrounding noises, including wind, will not come out. 3. Applicable to half helmets, full helmets, or wearing masks and ventilators. Applicable scenes Jungle, field, outdoor riding === 4. The U94 PTT part adopts high-intensity PTT, which can be pressed continuously for 30,000 to 50,000 times.