Item Type: Wireless Lavalier Microphone Material: ABS Model: T-3 Color: Black Gray Polarity Mode: Heart Shaped Pointing Type of Microphone: Capacitor Number of Channels: 49 Frequency Points Per Channel Channel Frequency: 600Mhz-649Mhz (Channel A); 650Mhz-699Mhz (Channel B) Oscillation Mode: Frequency Lock on DSP Chip Frequency Stability: ±10PPM Rf Power: 10dbm Audio Frequency Response: 50Hz-15KHz Distortion Rate: ≤0.5% Snr: ≥90db Reception Sensitivity: -95~-71dBm Open Space Barrier Free Use: 30m Battery Capacity: Built In 800mah Lithium Battery (400mah x 2) (Included) Scope of Application: Suitable for Loudspeaker, Speech Amplifier, PA System, Teachers, Fitness Coach, etc 1、Advanced Technology: New and upgraded wireless microphone headphone system, this wireless headphone microphone uses advanced UHF low power wireless transmission technology. 2、Superior Sound Quality: Built in high sensitivity microphone, signal stability, no delay, no radiation, anti noise, anti interference, constant frequency, clearer sound quality. 3、Wide Compatibility: Wireless headphone microphone is compatible with voice amplifier, high power speaker, portable PA system, mixer, and karaoke speaker system. 4、Lasting: Built in 400 mAh rechargeable lithium ion battery provides about 6 hours of working time before needing to be recharged. USB cable is included for charging transmitter and receiver. It only takes 2.5 hours to fully charge. 5、Compact Size and Suiatble: Light and comfortable, elegant appearance, small size, easy to carry. Say goodbye to long cables. Ideal for teaching, fitness instructor, public speaking, trainer, stage performer, etc. 6、Using Extra 6.5mm Plug: The plug on the receiver is 3.5mm. For 6.35mm amplifiers, use additional 6.35mm adapters (included) to connect more devices. 1 x Wireless Lavalier Microphone 1 x Receiver 1 x Data Cable 1 x Power Adapter 1 x 6.35mm Adapter 1 x Description