Description The U8 Headset wireless microphone is available for the S619UHF, M800UHF, H5, S92 Pro&Plus, and U8 Pro. When purchasing a wireless headset microphone, it is important to ensure compatibility with the existing voice amplifier by selecting the appropriate frequency band. You can find the information about the frequency range on the back of the voice amplifier unit or on the previous headset microphone you have used. Familiarizing oneself with the frequency specifications will ensure seamless integration and optimal performance. Features Adopt WinBridge original sound amplification electroacoustic system; Stylish, ergonomic and comfortable design; Import IC make voice more clear; Handheld and headset microphone 2 in 1 ; It can be used for 3-5 hours on a full charge Specification Transmit Power output:13dBm Sensitivity:-49dB(+-2dB)(0dB=1V/Pa) Direction features:Unidirectional Polymer battery: 3.7V 380mAh Impedance:≤2.2KΩ Product size: 150*190*50mm Net weight: 41g Frequency response: 30-20000Hz Warranty Lifetime Warranty WinBridge products are manufactured under the highest quality standards and craftsmanship. WinBridge provides a Lifetime Limited Warranty on all Voice Amplifiers (Technical Support). WinBridge Company will repair or replace, free of charge, during the applicable warranty period (1 Year Warranty), any part or finish that proves defective in material and/or workmanship under normal installation, use, and service. If repair or replacement is not practical, WinBridge Company may elect to refund the purchase price in exchange for the return of the product. These are your exclusive remedies.