1. UHF band, automatic frequency. 2. Phase-locked loop (PLL) frequency synthesizer. 3. Receiver automatically scans and locks the current environment 4. The microphone has two power adjustments. 5. Superheterodyne double conversion design with high receiving sensitivity. 6. Multi-stage high performance surface acoustic wave filter with excellent anti-interference ability. 7. The microphone uses a 5th battery and lasts for 6-8 hours. 8. The ideal environment for operating a radius of 100 meters. 9. The microphone uses a dual boost design, and the battery drop does not affect the transmit power.