Feature:1. Easily pairs to all kinds of FM supported devices such as speakers , megaphones , amplifiers , FM radio and car audio systems.2. Large screen to show frequency, simply pair the FM microphone to the speaker with the same frequency and you are ready to go.3. Built-in battery supports up to 6-12 hours use after full charge.4. The transmission frequency is from 87.0 Mhz to 108Mhz.5. Widely compatible for teaching , tour guide, sale , speech , conference , karaoke and more.Specification:Specification:Material: ABSSize: 6x2.2x2.2cmDisplay: YesThere is wireless: there isChannel: 2Use time: 6-12 hoursInput voltage: 3.7VHead: Capacitor headOutput power: 16mWAmplifier function: +1dB--+25dBPower supply mode: built-in lithium battery 3.7V250mAhMaximum sound pressure level: 130dB (at1 KHZ THD1%)Frequency response: 30Hz-20KHzTransmission frequency: 87MHz-108MHzEquivalent noise: 35dBApplicable object: as long as there is a radio, a loudspeaker with a display function can be usedNote: This FM high-fidelity wireless microphone does not have an audio player..Package List:1* Hands-free Wireless FM Condenser Microphone1* Chinese and English user manual1* charging cableNote: