-A High Level of Convenience and Flexibility Move unimpeded when performing without loss of sound quality. -Convenient And Easy to Use Plug and play solution for easy setup -UHF (ultra high frequency) Systems 20 selectable UHF frequencies for interference-free performance -Wireless Dynamic Microphone Clear, transparent audio with full frequency response -Versatile Compact Durable Allows multiple wireless microphones used simultaneously -ABS Plastic Material Offers style and durability. *CAUTION* 80% of the wireless issues could be resolved by changing fresh batteries and resetting. This package only contains the wireless microphone. An external sound system (Power speaker or amplifier) is needed to output the sound. NOT recommend to output with portable bluetooth speakers lower than 15 watt, such as JBL charge, Doss touch, Bose. Please Choose the USB wireless mic (Asin:B074C125TN) for recording audio if you need to use a wireless mic with your computer. The distance given only applies when there are no obstructions between the transmitter and receiver. This distance will vary if there is metal objects, human body or other obstructions.Battery life may vary depending on the type of battery used. 1.5V Alkaline batteries are recommended for wireless transmitter and receiver.