describe: PLUG AND PLAY: This wireless microphone system features a mini portable receiver with 1/4 output, making it easy to set up with your powered PA speakers, mixer or amplifier. The microphone can automatically pair with the receiver after being turned on, making it hassle-free Echo/Treble/Bass Effect: You can easily adjust the echo, treble or bass to your desired level using the buttons on the microphone; Ideal for karaoke, conferences, presentations, weddings, churches, etc.; Cardioid pickup pattern emphasizes the main sound source and minimize background noise. Even better, the handheld microphone is rechargeable and comes with a rugged metal casing to withstand frequent use Interference-free: Ultra-high frequency (UHF) microphone systems minimize radio frequency interference and noise generated by other electronic and digital devices. It offers wireless freedom, ease of use and 50 selectable UHF frequencies (10 frequencies per microphone, 500-599 MHz) for interference-free operation FULL COMPATIBILITY: The SZKOSTON microphone receiver features a 1/4-inch (6.35mm) output, compatible with most PA speakers, mixers and amplifiers equipped with 1/4-inch input connectors. The system has an operating range of up to 200 feet Rechargeable Handheld Microphone: Easily charge your microphone with a USB charging cable and say goodbye to the hassle of taking out and inserting batteries. Just plug in, charge and go Package contents: 1 piece wireless microphone