Features:<br />Wireless Headset Microphone/Receiver: having low battery indication and low battery shutdown function. A/B channel will avoid the distraction of the same frequency by changing frequency when using the same frequency.<br />Adopting UHF Digital PCB Board: 2.5ms transfer delay, up to 30 meters operating distance, good ability for anti-interference, more reliable and stable for transmit, has clear recording effect and pure sound.<br />Reliable Quality: ABS materials appearance, environmental protection and having damp-proof, corrosion resistance function.<br />Carrying Convenience: mini size is portable to carry with you.<br />Plug and Play, Strong Commonality: with 6.35mm standard audio plug that makes it suitable for loud-speaker, computer audio, pull rod audio amplifier, mixing console, etc.<br/>Specifications:<br />Material: ABS&#43;metal<br />Transmitter &amp; Receiver Channel A: 600~649MHz<br />Transmitter &amp; Receiver Channel B: 650~699MHz<br />Transmitter Power Supply: Built-in 3.7V 400mAh li-polymer battery<br />Receiver Power Supply: 1 * 3.7V 1200mA 18650 rechargeable battery<br />Microphone Transmitted Power: 10dB<br />Microphone Mic Type: Condenser<br />Receiver Frequency Range: 50Hz~15KHz<br />Receiver Power: USB5V/500mA-1A<br />Working Distance: 30 meters<br />Item Weight: 73g / 2.57oz<br />Package Weight: 220g / 7.76oz<br />Package Size: 23.5 * 18.5 * 6.5cm / 9.25 * 7.28 * 2.56in<br/>Packing List:<br />1 * Microphone<br />1 * Receiver<br />1 * USB Cable<br />1 * Manual (English)