Durable Use: The U94 PTT part is made of high-strength PTT material, designed to withstand 30,000 to 50,000 press cycles. The cord is constructed with cold-resistant PU tensile wire for high flexibility and durability. Easy to Use: The push-to-talk button activates the communication device and can be easily clipped onto clothing or belts. The speaker has an impedance of 3215% at 1kHz, delivering loud and clear audio. Application: Provides clear audio output with good noise rejection, making it suitable for use with half or full helmets during outdoor exploration, riding, and other outdoor activities. Bracket Type Earphones: Features a bracket-style throat vibration microphone with noise-reducing design. The coiled cord is retractable and adjustable to fit different neck sizes. Vibration Principle: Utilizes throat vibration to transmit sound, offering effective sound insulation even in loud or harsh environments. Package Includes: 1 x U94 PTT 1 x Telescopic Throat Vibration Microphone 1 x Earplugs 1 x Microphone Cable Item Type: U94 PTT Throat Microphone Material: PU + PTT Color: Black Compatibility: Designed for use with Motorola GP338, GP328, GP340, GP380, and other compatible two-way radios Speaker Specifications: Sound Pressure Level: 1083dB at 1kHz, 1mW Rated Power: 50mW Maximum Power: 100mW Speaker Impedance: 3215% at 1kHz Microphone Specifications: Sensitivity: -315dB at 1kHz (0dB=1V/Pa) Output Impedance: 120015% at 1kHz