Features: 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. 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. Full Directional Hifi Mic: the high fidelity mic remain more fine and exquisite sound quality. 360 Adjusted Flexible Shaft: soft shaft can be shaped at any angle as needed. Strong Clip: sturdy metal clip lets you easily attach it on the musical instrument, no easy to fall off. Inner side embedded with soft rubber to avoid scratching the instrument, suitable for a variety of musical instrument like saxophone, trumpet, horn, etc.. Plug and Play, Strong Commonality: receiver with 3.5mm standard plug, comes with a 6.35mm conversion plug, which makes it suitable for loud-speaker, computer audio, pull rod audio amplifier, mixing console, etc. Specifications: Material: ABS+metal Microphone & Receiver Channel A: 600~649MHz Microphone & Receiver Channel B: 650~699MHz Microphone & Receiver Battery: Built-in 3.7V 400mAh li-polymer battery Microphone Transmitted Power: 10dB Microphone Mic Type: Condenser Receiver Frequency Range: 50Hz~15KHz Receiver Power: USB5V/500mA-1A Working Distance: 30 meters Main Unit Size: 66 * 25 * 17mm / 2.60 * 0.98 * 0.67in Item Weight: 90g / 3.20oz Package Weight: 251g / 8.86oz Package Size: 23.5 * 18.5 * 6.5cm / 9.25 * 7.28 * 2.56in Packing List: 1 * Microphone 1 * Receiver 1 * USB Cable 1 * 6.35mm Conversion Plug 1 * Manual (English)