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 high-quality recording, whether it is personal indoor recording or small performance, D4M will 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 Independent input circuit Gain range: +10 dB to +60 dB Signal-to-noise ratio: 110 dB/112 dB Noise: -80dBu Channel crosstalk attenuation: Greater than -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 may vary depending on the batch, but this does not affect use. 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. Voltage:AC110V/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.