UHF Frequencies--The wireless lapel microphone system has 20 frequencies selection for seamless, interference-free operation.An easy-to-read LCD information display provides constant monitoring of system operation, Receiver battery condition indicators with low-battery warnings.Convenient and easy to use-- No static,no drop out with use at a distance of 40-65 feet.With paired ID synchronization for each wireless transmitter and receiver make setup easy.Setting up a wireless mic is as simple as plugging in a wired microphone.Wireless Headset and Lavalier--Headset microphone fits securely for active speakers and vocal performers.Lavalier microphone with included tie clip offers low visibility and hands-free use.optimized for Houses of Worship in a church preaching,YouTube videos,and classroom and presentation applications.Versatile and Compatible Microphone-Work with mixers, pa speakers, electric guitar amplifiers and sound boards with 1/4" interface to output the sound, ideal for teaching lectures,conference speech, visiting guide,recording flute.With included 1/4" to 1/8" adapter-cable, suit for camera equipped 3.5mm mic jack recording.What You Get--Wireless microphone set included headset microphone and Clip-on Lavalier Microphone Body pack Transmitter, Receiver with 1/4" Plug,Solid metal collar clip and windscreen reduces plosives, wind, and breath sounds.Female 1/4" to 1/8"Adapter Converter Cord.Please use our original lapel microphone which is equipped, it’s more compatible with the FIFINE wireless transmitter, and make the sound better.The figure given is only the approximate value that applies when there are no obstructions between the transmitter and receiver and they need to be in direct line of ‘sight’ for them to work.This distance will vary depending on metal objects, people and other obstructions and on the signal strength.Battery life may vary depending on the type of battery used.1.5V Alkaline batteries are recommended for wireless transmitter and receiver.