There is writing in magic marker on the memory. Please consider this as junk. It works, but since it's considered junk, please understand that it's non-refundable and non-returnable. This is a USB audio interface with effects and loopback functions. - Model Name: UA-4FXII - USB Connection: Yes - Effect Function: ADVANCED EFFECTS - Mic/Guitar Input: Yes - Output Terminals: OUTPUT - Line Input: LINE IN - Phantom Power: ON/OFF Switch - Loopback Function: Yes Thank you for viewing.