This wireless microphone set adopts UHF (ultra-high frequency) band which provides strong anti-interference. It has high pick up sensitivity and good tone quality, suitable for business meeting, speeches, teaching, live performance and more situations. Features: This set includes a transmitter with antenna, a receiver with antenna, a headset microphone, an USB cable and a user manual. Adopting UHF (ultra-high frequency) band, the wireless microphone set has the advantage of strong anti-interference. Extremely high pick up sensitivity and good tone quality make your speech or singing more clear. The transmitter is powered by 2 AA batteries (not included), the receiver is powered by 1200mAh rechargeable lithium battery. Long distance connection between transmitter and receiver, the set is suitable for business meeting, speeches, teaching, live performance, etc. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Black Material: Plastic Frequency Range: 600MHz-700MHz Modulation Mode: Digital Frequency Modulate Frequency Response: 50Hz-18KHz S/N: more than90dB Distortion: less than 0.5percent @1KHz Output Level: 200mV+/-5mV Sound Cartridge: Dynamic Transmitter Power Supply: 2 * 1.5V AA Battery (not included) Receiver Power Supply: 1200mAh Lithium Battery (included) Item Size: 180 * 66 * 23mm / 7.09 * 2.60 * 0.91in (Transmitter); 203 * 37 * 23mm / 7.99 * 1.46 * 0.91in (Receiver) Item Weight (without battery): 67g / 2.36oz (Transmitter); 29g / 1.02oz (Receiver) Package Size: 31 * 14 * 6.5cm / 12.20 * 5.51 * 2.56in Package Weight: 320g / 11.27oz Package List: 1 * Transmitter 1 * Receiver 1 * Headset Microphone 1 * USB Cable 1 * User Manual (English)