Features 1.Key talk design: It has a remote control microphone with key. It can edit anywhere and anytime, control the conversation at the same time, very convenient for you to use. 2.Easy to hide: Transparent tube close to fuselage color, convenient for you to hide, split design, easy to replace. 3.Interphone series: Air sound tube headphones allow maximum response range of 3km-5km, long distance and stable frequency so that it can be used in many occasions. 4.Flexible and portable: Made of PU, this kind of cable is very flexible. It can be carried easily. It can be put in the pocket or the box or the bag. 5.It adopts environment-friendly PU cable, which is of high quality and durable. specificationFeatures: 1. Key talk design: It has a remote control microphone with key. It can edit anywhere and anytime, control the conversation at the same time, very convenient for you to use. 2. Easy to hide: Transparent tube close to fuselage color, convenient for you to hide, split design, easy to replace. 3. Interphone series: Air sound tube headphones allow maximum response range of 3km-5km, long distance and stable frequency so that it can be used in many occasions. 4. Flexible and portable: Made of PU, this kind of cable is very flexible. It can be carried easily. It can be put in the pocket or the box or the bag. 5. It adopts environment-friendly PU cable, which is of high quality and durable. 6. Applicable to retail, entertainment, hotels, restaurants and other commercial users. : Condition: 100% Brand New Item Type: Tube Headset Material: ABS + PU Color: Black Loudspeaker Size: Approx. 16mm / 0.6inch Speaker impedance: 90ohms15% Rated input power: 1W Maximum input power: 1.5W Sensitivity: 1163dB/1KHz Distortion rate: