Feature:1. Adjustable Size: Stand type throat vibration noise reduction headphones, adopt advanced engineering design, easy to shrink, adjustable coil size.2. Practical and Convenient: The throat control earphone has button activates PTT device, which can be hung on clothing or belt. Clear sound and firm.3. Wide Application: The throat mic earpiece is apply to half helmet and full helmet. Applicable scenarios: jungle, field, outdoor cycling and so on.4. High Toughness: U94 PTT part adopts high strength PTT, can continue to press 30,000 to 50,000 times.5. Wire Material: The wire adopts cold resistant PU tensile wire, with high flexibility and toughness. Speakers imported from Taiwan 32Ω±15% at 1KHZ, loud and thick.How to Use:Plug and PlaySpecification:Item Type: Throat Mic EarpieceMaterial: PU+PTTColor: BlackApplicable: For XIR P8268 P8668 DP4400 DP4800The Loudspeaker SpecificationSound Pressure Rating: 108±3dB at 1KHZ 1mWRated Power: 50mWMaximum Power: 100mWSpeaker Impedance: 32Ω±15% at 1KHZMicrophone SpecificationsSensitivity: -31±5dB at 1kHz 0dB=1V/0.316GOutput Impedance: 1200Ω±15% at 1KHZ Package List:1 x U94 PTT 1 x Retractable Throat Vibrating Microphone 1 x Earplugs 1 x Microphone Cable Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.