With monitor level control and mono/stereo switching, the ma400 has everything you need, even for the most demanding performers on the stage. Change flexible microphone and microphone connectors and ground lift switches, as well as stereo monitor inputs and dedicated Connector: RCA, 1/4 inch Power: DC 12V Power adapter:input 240V 50 / 60Hz, output - 12V 500mA Plug Type: EU Plug, it applies to Indonesia, Germany, France, , Italy and so on. size:10.3 * 5.7 * 3cm / 4.1 * 2.2 * 1.2 inch Material:metal colour:Black Package Contents: 1 * Preamplifier 1 * EU Plug Only the above package content, other products are not included. Note: Light 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.