Advanced Chip Design: This cordless microphone system features a high-integration chip design with ID code pairing certification, ensuring reliable and stable performance for your audio needsVersatile Channel Options: With many adjustable channels, you can easily find the best frequency to avoid interference and ensure clear sound transmissionWide Frequency Response & Stability: Enjoy a broad frequency response range of 40Hz-18kHz, delivering audio output for various applicationsLong Operating Range & Battery Life: The device operates effectively within a range of 30 meters and is powered by a built-in 5V, 800mAh lithium battery that provides up to 6-8 hours of continuous use on a single chargeUniversal Compatibility: Designed for use with microphone, speakers, electric blowpipe or guitars, this product comes with essential accessories Specification: Material: PP Size Chart: 12.8cm/5.04inch Package Includes: 1x Receiver1x Transmitter2x Converter Heads1x USB Cable Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.