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. 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). Each channel has 3-band equalization adjustable. When connected to the computer using USB, the professional sound card output allows you to get For recording, whether it is personal indoor recording or small performance, D4M be your most cost-effective small mixer. Multi-function mode input,Support MP3/U disk/SD card playback, enjoy music anytime, anywhere. Input/Output: 6.3mm jack, balanced input circuit Gain range: +10 dB to +60 dB Signal-to-noise ratio: 110 dB/112 dB Noise: -80dBu Channel crosstalk attenuation: -82dB Frequency response: +/-0.5dB 20Hz-20kHz Total harmonic distortion:Less than 0.03% @ 1 KHZ Microphone maximum input level: +16dBu Maximum line input level: +30dBu Stereo maximum input level: +20dBu Headphone output: (200)300mW Other outputs: +20dBu Treble: 12KHz, +/-15dB Bass: 80Hz, +/-15dB Power consumption: 10W Input power: 100-240VAC03A50/60Hz Output power: 5V2A The product appearance and printed words depending on the batch, but this does not affect use. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC100-240V Colour:As Shown Material:Metal Package Contents: 1 * Audio Mixer 1 * adapter Only the above package content, other products are not included. 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.