Wireless Head-Worn FM Microphone with Small AmplifierFM Microphone Wireless Headset Small Amplifier Head-Worn Microphone FM Microphone Wireless Headset Small Amplifier Head-Worn Microphone 1. Note: The FM high-fidelity wireless microphone needs to be used with the FM radio function audio or power amplifier, amplifier, etc., and cannot be independently amplified. 2. As long as there is FM FM radio function, switch to FM radio function after power on, and the same frequency points are consistent, you can wirelessly amplify 3. 225 wireless transmission channels, covering the 87-108MHZ frequency band 4. Microphone loudspeaker, no whistling 5. Battery capacity: 250mAH 6. Use time: 6-12 hours 7. Sound pressure level: greater than or equal to 130 decibels 8. Frequency response: 30Hz-20KHz 9. Output power: 16mW 10. Weight: 30 grams