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. 6. Noise Reduction: Throat vibration produces sound, which is highly soundproof even when used in very noisy and harsh environments. Ambient noise will not be heard. Specification: Item Type: Throat Mic Earpiece Material: PU+PTT Color: Black Applicable: For MOTOROLA XIR P8268 P8668 DP4400 DP4800 The Loudspeaker Specification Sound Pressure Rating: 108±3dB at 1KHZ 1mW Rated Power: 50mW Maximum Power: 100mW Speaker Impedance: 32Ω±15% at 1KHZ Microphone Specifications Sensitivity: -31±5dB at 1kHz 0dB=1V/0.316G Output 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.