Please install the drivers from NATIVE INSTRUMENTS HP before use. This is a listing for the main unit only, without the box, installation disc, serial number, or transfer ID. Please understand that this is a used item and agree to no claims and no returns regarding the above. I am currently unable to confirm functionality due to the lack of a working environment. When connected to USB power, the entire unit lights up briefly and then turns off. MASCHINE MK1 with 16 pads, featuring sampling and sequencer functions. Includes the main unit and USB cable only. - Model: MASCHINE MK1 - Number of Pads: 16 - Display: 2 LCD displays - Control Knobs: 4 encoders - Connection Type: USB connection - Functions: Sampling, sequencer, pattern creation - Number of Groups: 8 groups (A to H) Thank you for viewing.