286231 Features: Suitable for Sound BLASTR 0060， laptop， teaching amplifier， and portable speaker. The dynamic Mi core provides you more real tone quality. Wireless karaoke microphone， more convenient than the wired ones， enables you to fully enjoy the endless fun of network karaoke. Also a wonderful multi-media equipment for home party， meeting， speech and teaching， etc. Color: Blue Microphone size: about 230 x 55 x 55 mm Applications: KTV， host， and outdoor ads， etc. Product parameter: Frequency Range: 180MHz - 270MHz Frequency response: 60Hz -13kHz Modulation mode: FM Working distance: about 30m Microphone power supply: 9V battery (Not included) Note: After microphone is connected to computer ， you need select microphone in computer sound setting， then there will be sound. The 3.5mm plug of receiver must be connected to the microphone MIC jack. 1 x Microphone 1 x Receiver 1 x English user manual In original package