Philips KEY005 128MB MP3/WMA Player and Thumb Drive A five key in-line remote control provides added freedom and flexibility Large 128MB capacity - enough for four hours of WMA music or two hours of MP3 audio MP3 and Windows Media Audio ( WMA ) compatible Plugs into any USB port, with no need for extra cables, drivers, or any other additional software Doubles as an external PC hard drive - ideal for transferring data between computers, backing up important files, or storing personal information