USB powered and Class Compliant for true plug playWith a built-in driverJust connect to a computer USB socket for automatic installation of the driver1 in and 1 out MIDI interface, 16 MIDI input channels 16 MIDI output channelsLED indicate power on , MIDI in signal and MIDI out signal ,Windows XP, Vista and Mac OS . กดเพื่อดูเบอร์โทร xxxxxx407กดเพื่อดู Line: xxxxxอ่านเพิ่มเติม