2.4G Wireless Headset Microphone, Adopts 2.4G GFSK Frequency Hopping Digital Technology, Auto-Connect On Power On, 50M Wireless Range, 6H Battery Life, Near-Field Pairing (Anti-Interference), Original Sound & Reverb Dual-Mode Switch (Press "+" "-" Simultaneously), 45Min Auto Shut-Off When No Audio Input. Versatile Wireless Microphone With Detachable Headset, Multi-Unit Use Without Interference, Suitable For Teaching, Speeches, Hosting And More