Yanmai UF9 Broadcast Wireless Lavalier Microphone Mini Clip-on Mic Features: 1. Microphone volume adjustment, with LED light display 2. Self-connection after booting, frequency is stable 3. 30 meters barrier-free and stable transmission 4. Freely place 2 AAA batteries (not included) in the battery compartment, work continuously for 6 hours 5. Real-time monitoring, clear sound, no stuck, constant frequency 6. Support SLR, mobile phone, audio and other equipment connection 7. Equipped with two lavalier microphones and two hose microphones, customized condenser microphone core, metal material, anti-drop and durable 8. Support one-to-one and one-to-two modes of use, no serial frequency, flexible collocation, easy to deal with various scenarios 9. Multi-purpose and multi-compatible, making short video creation, live sound pickup, program interviews, online class teaching, etc. have good sound quality parameter: 1. Transmitting power: greater than or equal to 10dB 2. Frequency response: 80HZ-16KHZ 3. Pickup method: condenser microphone core, cardioid pointing 4. Power supply: 2×AAA (not included) 5. Frequency offset max: +-10KHZ 6. Use distance: 30M (barrier-free) 7. Number of channels: 25CH 8. Directivity: Cardioid 9. Signal-to-noise ratio: greater than or equal to 81dB 10. THD: less than or equal to 0.1%