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. Stable Signal: Our system offers effortless operation - with just a simple turn-on, the receiver automatically synchronizes with the transmitter's frequency. 15 adjustable channels to get rid of radio interference, up to 15 sets can be used simultaneously. Experience the convenience of hassle-free frequency synchronization and high-quality audio transmission during your numerous events or performances. Plug and Play: Our receiver provides effortless connectivity via a 6.35mm microphone jack, making it suitable for use with karaoke machines, powered speakers, amplifiers, mixers, and audio interfaces. Note that this system is not compatible with mobile phones, computers or tablets. Wide Receiving Range: With a broad operating range of 200 feet (line of sight), our receiver allows you to move freely during performances with the cordless microphone. Whether it's indoor or outdoor events, like family karaoke, church gatherings, weddings, meetings or lectures, this system is the perfect choice. Exceptional Sound Quality: This high-quality wireless mic provides exceptional sound reproduction with minimal noise and distortion, benefitting from its cardioid pickup pattern that isolates the main sound source while minimizing unwanted background noise. A dynamic mic with a cardioid pickup pattern for further enhanced recording.