The WM-16HH is a wireless handheld microphone with an operating range of up to 150 feet. It features switching diversity for improved reliability of the wireless link with 16 selectable UHF frequencies. Outputs include both XLR balanced and a 1/4" mono jacks. The system has a signal-to-noise ratio greater than 94 dB for excellent sound quality. LED "On" and "Low Battery" lights indicate operation status, with a convenient on/off switch on the mic itself. The WM-16HH comes complete with a uni-directional electret condenser wireless mic, a receiver, and 12-volt DC power supply.Hand Held PLL Synthesized UHF Wireless Microphone System Switching diversity (Antenna diversity) Super high sensitivity, low noise transmission and reception Diversity A/B indicators- indicates the antenna has received the RF signal AF indicators the audio signal has been received Uni-directional electret condenser unit microphone 16 selectable UHF frequencies Outputs: XLR balanced & unbalanced 1/4-inch mono jack Wireless range up to 150 ft. (In standard condition) Freq. channel: 682-698MHz S/N ratio more than 94dB On/Off control on mic On & Low Battery LED indicators Includes small screwdriver inside mic to change frequencies