Feature:1. WIDELY APPLICABLE: A headset specially designed for high noise places such as airports, racing cars, docks, mining, high altitude operations, etc, suitable for staff who use walkie talkies for communication.2. FLEXIBLE USE: Coiled design, the straightened length can up to 2.5m/8.2ft, the sealed sponge earmuffs can be replaced, and the length of the ear rods can be adjusted to meet different needs.3. PORTABLE: U94 PTT comes with a clip, which can be hung on your clothes or belt, the PTT button is located at the bottom of the earmuffs, lightly press the red button to initiate a call.4. DURABLE: High strength U94 PTT, which can be pressed continuously for 30,000 to 50,000 times, the wire is made of cold resistant PU tensile wire, which has high flexibility and strong toughness.5. COMPATIBLE: U94 PTT is suitable for 3.5mm mobile phone plugs, the button activates the PTT device, it is safer to use this heavy duty noise canceling headset to communicate with others.How to Use:Plug and play.Specification:Item Type: Noise Reduction Headphone + U94 PTTMaterial: PU + ABSColor: BlackApplication: U94 PTT is Suitable for 3.5mm/0.1in Mobile Phone PlugMicrophone SpecificationsSensitivity: -44±3dB at 1kHzRated Impedance: 680ΩProduct Frequency: 20Hz-160HzWorking Voltage: 1.5V-4.5VDirectional Function: Single Direction, Noise CancellationSpeaker SpecificationsSpeaker Size: Approx. Φ36mm/1.4inRated Input Power: 0.5WMaximum Output Power: 1WSensitivity: 100±3dBSpeaker Impedance: 8ΩWire SpecificationsDurable Temperature: 60℃-30℃ Package List:1 x U94 PTT1 x Noise Reduction Headphone