Features:<br />crisp and loud -- this handheld microphone set clearly amplifies sound without any static or buzzing.<Br />two modes to connect to background music -- bt type and line-in type.<Br />microphone&#39;s volume and reverberation can be adjusted by knobs on the receiver box.<Br />microphone adopts uhf band, working distance is more than 15 meters, suitable for outdoor use.<Br />the handheld microphone and receiver box are made of aluminium alloy in compact design and upscale appearance, widely applies for conference, lecture, home entertainment, etc.<Br />support professional microphone frequency conversion operation ( 25 channels are optional) whenever and wherever possible to avoid interference signals.<Br />microphone priority function -- the background music will be turned down automatically to highlight human voice when talking to the microphone.<Br/>specifications:<br />microphone --<br />model: k28<br />material: plastic, metal<br />color: silver &#43; gold<br />transmitting power: ≤ 10mw<br />transmitting distance: ≥ 15m<br />snr: ﹥ 70db<br />distortion: ≤ 0.5%<Br />optional channel: 25 channels<br />power supply: 2 aa batteries (3v) &#xff08;battery is not included&#xff09;<br />frequency response: 80hz-10khz<br />microphone length: 24cm / 9.45In<br/>receiver box --<br />power supply: adaptor (5v 1a)<br />working current: ≤300ma<br />bit width: 16bit<br />time delay: ≤ 5ms<br />bt: 4.1<Br/>package size: 27.8 * 16.2 * 11.3Cm / 10.94 * 6.38 * 4.45In<br />package weight: 1151g / 40.6Oz<br/>packing list:<br />2 * handheld microphone<br />1 * receiver box<br />1 * usb plug to dc plug power cord<br />3 * audio cable (including switcher)<br />2 * antiskid rings<br />1 * user manual