1. wireless microphone in hand, karaoke voice, plug and play, frequency range, less interference, easy and perfect to show your voice. 2. Using electronic circuit control, it can capture rich and full sound from the directly in front of the microphone. 3. Suitable for all events, such as karaoke, live performances, conferences, churches, schools, auditoriums, parties, etc. 4. The USB receiver supports a of devices, and the device supports a wide range of applications. The device has a USB interface and a microphone interface, which can be connected and used. 5. Stable signal long-distance reception, no noise at constant frequency within 50m, strong anti-interference ability, wireless receiver with a receiving range of 50m (no strong interference) Strong compatibility, suitable for equipment in various occasions, equipment with 3.5mm/6.35mm microphone interface can be used. Name: wireless microphone Pointing: heart-shaped pointing Battery life: 3-6 hours Signal-to-noise ratio: 75dB Frequency response range: 60Hz-15KHz Colour:black Material:plastic Package Contents: 2 x Wireless microphone 1 x Audio Cable 1 x Usb Receiver 1 x Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.