usbdevs -v 
Controller /dev/usb0: 
addr 1: self powered, config 1, UHCI root hub(0x0000), Intel(0x0000), rev 1.00 
 port 1 addr 2: low speed, power 26 mA, config 1, N48(0xc001), Logitech(0x046d), rev 4.00 
 port 2 powered 
 
/var/log/messages 
kernel: ums0: Logitech N48, rev 1.00/4.00, addr 2, iclass 3/1 
kernel: ums0: 3 buttons and Z dir.