Long Working Time: Each microphone is powered by 2 AA batteries to ensure its long working time (AA Batteries NOT INCLUDED). The receiver with a 1500mAh built-in rechargeable battery for 5-6 hours of continuous use with just 2-3 hours of charging. Made of metal paint and ABS plastic, this microphone is lightweight and durable for on-the-go use. The display screen shows battery and signal strength for optimal performance. 15 Adjustable Channels: Our system provides effortless operation - simply turn it on, and the receiver will automatically synchronize with the transmitter's frequency. With 15 adjustable channels, you can eliminate radio interference, making it possible for up to 15 sets to be utilized simultaneously. Enjoy the convenience of effortless frequency synchronization and high-quality audio transmission at your numerous events and performances. Plug and Play: With its 6.35mm wireless microphone jack, our receiver effortlessly connects to various devices such as karaoke machines, powered speakers, amplifiers, mixers, and audio interfaces. Please note that this system is not compatible with mobile phones, computers, or tablets. Wide Receiving Range: Enjoy a remarkable line-of-sight range of up to 200 feet with our cordless microphone and receiver, giving you the freedom to move around effortlessly both indoors and outdoors. Use it for a multitude of events, such as family karaoke, church gatherings, weddings, meetings, and presentations. High Quality Sound: The cardioid pickup pattern of this high-quality wireless mic significantly reduces unwanted background noise while focusing on the targeted sound source, resulting in an exceptional recording quality that exhibits minimal distortion and noise. Its dynamic mic with a cardioid pickup pattern provides additional benefits to ensure superior audio performance.