I use a laptop based system for party music and karaoke nights. I had been using the laptop's 3.5mm earphone socket and conventional cables to connect to my amplifier but felt I wasn't getting the best sound quality. I bought this unit, simply to connect the laptop to my amplifier via USB. When I first connected the device, the laptop found and installed the hardware and it worked but with one significant problem, volume much too low. As I was working at the time, I quickly reconnected my old cables and carried on as before. The following day I reconnected the device and went into the 'sound' section of 'control panel' (running 'Windows XP' SP3)I quickly found that the properties assigned to USB sound were 'volume' at about 10%. I adjusted this to 100%, clicked 'Apply' and all was well! The sound quality is definitely better and the volume is up about 20% on the original connection method. I can't comment regarding the other capabilities of the device but it works very well for me.