Shure UT-883 Professional Wireless Microphone System

The UT - 883 is a professional quality wireless Clip Microphone with UT -
883 frequency and 50 to 100 meters range. This wireless microphone
system is suitable for public speaking and singing, it can also be used
on public address systems, Guitar, trumpet, saxophone. Also can be used
on Video Camera. It comes with a rechargeable receiver and a body pack
transmitter that has volume control. - Frequency Response: Extremely low
distortion - Fully Eliminate the interference signal - High receptive
antenna, Beautiful and practical - Battery signal - Operating distance :
50 to 100 Meters It comes with a rechargeable receiver, body pack
transmitter, tie-clip Mic, charger cable, battery and owners manual. 

A wireless microphone, or cordless microphone, is a microphone without
a physical cable connecting it directly to the sound recording or
amplifying equipment with which it is associated. Also known as a radio microphone, it has a small, battery-powered radio transmitter in the microphone body, which transmits the audio signal from the microphone by radio waves to
a nearby receiver unit, which recovers the audio. The other audio
equipment is connected to the receiver unit by cable. In one type the
transmitter is contained within the handheld microphone body. In another
type the transmitter is contained within a separate unit called a
“bodypack”, usually clipped to the user's belt or concealed under his
clothes. The bodypack is connected by wire to a "lavalier microphone" or
"lav" (a small microphone clipped to the user's lapel), a headset or
earset microphone, or another wired microphone. Most bodypack designs
also support a wired instrument connection (e.g., to a guitar). Wireless