Designed for law enforcement, firefighters, sports, playgrounds and other professionals, this single-earth air-guided headset is ideal for shoulder microphones or two-way radios near the shoulders and chest. Clips can be clipped onto the shirt for ease of use. Features: High-sensitivity air duct, anti-radiation noise reduction, clear sound. High quality plastic housing, rotatable metal back clip, transparent conduit, good concealment Suitable for two-way radio (audio only) with 3.5mm headphone jack connector, radio speaker microphone, remote microphone and other audio accessories. Made of high quality materials for comfort and durability. With PU retractable winding, it is flexible to use. Soft silicone earplugs, fits your ears, is comfortable to wear, and does not fatigue when you use the headphones for a long time. Specification: Color: Black curve + Transparent catheter Material: PU + Silicone Curve length: 60cm/23.6in Plug: 3.5mm single K head Package list: 1 * Curve 1 * Air Duct 1 * Replace Earbuds 2 * Pink Earplugs Note: 1. Listening alone can only answer and can't talk or talk. 2. It can be used if it is used for computer/mobile phone/MP3. But the sound may be smaller because the impedance is different. 3. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. 4. The measurement allowed error is +/- 1-3cm.