The Audio D4M 4-channel audio mixer is a portable mini audio interface that runs on a 5V power supply and is suitable for outdoor use.<br> D4M has built-in Bluetooth and MP3, as well as standard 48V power supply, digital reverberation effect and dual headphone jacks (3.5mm&6.5mm).<br> Each channel has 3-band equalization adjustable. When connected to the computer using USB, the professional sound card output allows you to get For high-quality recording, whether it is personal indoor recording or small performance, D4M will be your most cost-effective small mixer.<br> Multi-function mode input,Support MP3/U disk/SD card playback, enjoy music anytime, anywhere.<br> Input/Output: 6.3mm jack, balanced<br> Independent input circuit<br> Gain range: +10 dB to +60 dB<br> Signal-to-noise ratio: 110 dB/112 dB<br> Noise: -80dBu<br> Channel crosstalk attenuation: Greater than -82dB<br> Frequency response: +/-0.5dB 20Hz-20kHz<br> Total harmonic distortion:Less than 0.03% @ 1 KHZ<br> Microphone maximum input level: +16dBu<br> Maximum line input level: +30dBu<br> Stereo maximum input level: +20dBu<br> Headphone output: (200)300mW<br> Other outputs: +20dBu<br> Treble: 12KHz, +/-15dB<br> Bass: 80Hz, +/-15dB<br> Power consumption: 10W<br> Input power: 100-240VAC03A50/60Hz<br> Output power: 5V2A<br> The product appearance and printed words may vary depending on the batch, but this does not affect use.<br> Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. / EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on.<br> Voltage:AC110V/AC100-240V<br> Colour:As Shown<br> Material:Metal<br> Package Contents:<br> 1 * Audio Mixer<br> 1 * adapter<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.