ULTRA LOW-NOISE4 CHANNEL LINE MIXER - Easily matches most musical instruments, microphones, computers, mobile phones and other audio devices. WITH RGB LIGHT VOLUME ADJUSTMENT KNOB - The SIG light is the signal level light, when there is a signal passing through the channel Lights up and flashes with the signal level. The ability to extend a standard size mixer is where the MH400 works its magic, for example when it is used as a submixer. If you don't have enough channels available on your "big" mixer and need to add 3 more keyboards or other instruments to the mix, just connect them to the MH400, dial in the mix - and connect the MH400's output to the main A single input on a mixer. This is just one example of how the MH400 can add versatility to your current setup - imagine the possibilities! Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC 220V Colour:Black Material:iron Package Contents: 1 * Mini 4-way mixer 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.