K-06 2.4G Head-Mounted Wireless Microphone Amplifier Headset 1. Ergonomic design, comfortable to wear 2. Wireless transmission, plug-and-play, anti-crowding, no noise 3. One design for both handheld and head-worn, strong anti-interference, stable signal 4. Good compatibility, suitable for amplifiers, pull-cord speakers, buses, multimedia speakers, power amplifiers, etc 5. Earpiece detachable, convenient to carry, easy to operate 6. 2.4G signal transmission stable, no frequency interference, long transmission distance, strong signal penetration 7. High-sensitivity microphone core, stable and clear sound pickup, easy to amplify Parameters 1. Frequency range: 510 - 590 MHz 2. Reception sensitivity: -88 dB 3. Power supply: DC 5V 4. Total harmonic distortion: 0.2% 5. Dynamic range: 110 dB 6. Output power: 10 mW 7. Frequency response: 20 Hz - 20 KHz (3 dB) 8. Transmission distance: 30 - 50 m 9. Battery capacity: 200 mAh 10. Charging interface: Type-C