Features:  48 velocity and pressure sensitive performance pads with RGB backlit, can be assigned easily as pads, MIDI CC buttons or program change switches.  8 assignable knobs and 8 assignable sliders, each can be edited by user, very flexible to operate.  16 function buttons, providing functions like Note, Octave, After touch, Channel, Velocity, Mute, etc.  With MIDI IN & MIDI OUT, USB 2.0 connection,  compatible with Win10/8/7/XP/Vista and Mac OSX, drive free and hot-plug supported.  Supports power supplied by USB and DC 5V, plug and play, start your creative work at any moment.    Specifications:  Color: Black  Material: Plastic  Power Supply: DC 5V or USB 2.0  Operating System: Support for Win XP/ Vista/ Win7/ Win8/ Win10/ Mac OSX  Item Size: 25.6 * 25.6 * 2cm/ 10 * 10 * 0.8in  Item Weight: 870g/ 1.9lbs  Package Size: 31 * 29.5 * 7cm/ 12.2 * 11.6 * 2.8in  Package Weight: 1195g/ 2.6lbs    Note:  You need to connect the MIDI controller with software editor before usage. You can download the users' manual and the software editor for the website(www.worlde.com.cn) on the QUICK START paper.  If you want to use this MIDI controller with your smartphone or tablet,  you need to purchase one OTG cable separately.  This MIDI controller hasn't sound module inside, you can't get sound by connect it  to headphones or speaker instantly.    Package List:  1 * MIDI Controller  1 * USB Cable  1 * DC Power Cable  1 * 3.5mm Connection Cable     1 * 3.5mm Connection Cable