Looking for a PC-Bluetooth adapter working under LINUX

Don't remeber where I bought it, sorry. dmesg says:

usb 7-1: new full-speed USB device number 4 using ohci-pci
usb 7-1: New USB device found, idVendor=0a12, idProduct=0001, bcdDevice=88.91
usb 7-1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
usb 7-1: Product: CSR8510 A10