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: ABS Size: 6x2.2x2.2cm Display: Yes There is wireless: there is Channel: 2 Use time: 6-12 hours Input voltage: 3.7V Head: Capacitor head Output power: 16mW Amplifier function: +1dB--+25dB Power supply mode: built-in lithium battery 3.7V250mAh Maximum sound pressure level: ≥130dB (at1 KHZ THD≤1%) Frequency response: 30Hz-20KHz Transmission frequency: 87MHz-108MHz Equivalent noise: ≤35dB Applicable object: as long as there is a radio, a loudspeaker with a display function can be used Note: This FM high-fidelity wireless microphone does not have an audio player. . Package List: 1* Hands-free Wireless FM Condenser Microphone 1* Chinese and English user manual 1* charging cable Note: