Feature: 1. NOISE REDUCTION: 7.1mm motorcycle bilateral helmet headset, designed for use with motorcycle helmets. The microphone reduces noise and the sound is clearer. 2. COMFORTABLE: This motorcycle helmet headset has stereo and good sound quality characteristics, which provides great comfort to your ears. 3. PTT MATERIAL: U94 PTT part adopts high strength PTT, which can be pressed continuously for 30,000 to 50,000 times. With hook and loop, it is easy to fix, very durable and easy to use. 4. WIRE MATERIAL: The wire is made of cold resistant PU tensile wire, which has high flexibility and toughness. With a clip, it can be hung on clothes or belts. 5. APPLICATION: Push the button to activate the PTT (Push to Talk) device. Suitable for MT heads such as for Motorola GP88 GP‑300 GP3688 DEP450 EP450. How to Use: Plug and play Specification: Item Type: Helmet Headset + U94 PTT Material: ABS Colour: Black Frequency Response: 150Hz-500Hz Sensitivity: 46-60dB Impedance: 8 Ohm Application: Suitable for MT Heads Such As for Motorola GP88 GP-300 GP3688 DEP450 EP450 Package List: 1 x Helmet Headset 1 x U94 PTT