Features: 64 velocity and pressure sensitive performance pads with backlit can be assigned easily as pads MIDI buttons or program change switches. 24 function buttons providing functions like Note Octave After touch Channel Velocity Mute etc. Built-in 128MB sound module you can connect this MIDI controller with headphone or speaker immediately to get sound. With MIDI IN & MIDI OUT USB 2.0 connection compatible with Win10/8/7/XP/ OSX Android and iOS drive free and hot-plug supported. Supports power supplied by USB and DC 5V plug and play start your creative work at any moment. Compact size and lightweight very convenient to carry around. You won t miss moments of inspiration. Specifications: Type: without sound module/ with sound module(optional) Color: Black Material: Power Supply: DC 5V or USB 2.0 Operating System: Support for Win XP/ / Win7/ Win8/ Win10/ OSX/ Android/ iOS Item Size: 25.6 * 25.6 * 2cm/ 10 * 10 * 0.8in Item Weight: 820g/ 1.8lbs Package Size: 31 * 29.5 * 7cm/ 12.2 * 11.6 * 2.8in Package Weight: 1150g/ 2.5lbs 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. Package List: 1 * MIDI Controller 1 * USB Cable 1 * DC Power Cable 1 * 3.5mm Connection Cable