cat devices

root@jetli:/etc/X11# cat /proc/bus/input/devices 
I: Bus=0017 Vendor=0001 Product=0001 Version=0100
N: Name="Macintosh mouse button emulation"
P: Phys=
S: Sysfs=/class/input/input0
H: Handlers=mouse0 event0 
B: EV=7
B: KEY=70000 0 0 0 0 0 0 0 0
B: REL=3

I: Bus=0003 Vendor=046d Product=c70e Version=0111
N: Name="Logitech Logitech BT Mini-Receiver"
P: Phys=usb-0000:00:03.0-1.2/input0
S: Sysfs=/class/input/input1
H: Handlers=kbd event1 
B: EV=120003
B: KEY=10000 7 ff800000 7ff febeffdf ffefffff ffffffff fffffffe
B: LED=1f

I: Bus=0003 Vendor=046d Product=c70a Version=0111
N: Name="Logitech Logitech BT Mini-Receiver"
P: Phys=usb-0000:00:03.0-1.3/input0
S: Sysfs=/class/input/input2
H: Handlers=kbd mouse1 event2 
B: EV=f
B: KEY=7fff 2c3027 bf004440 0 0 fff0001 f80 8807c000 667bfa d941dfed 9e0000 0 0 0
B: REL=1c3
B: ABS=1 0

I: Bus=0010 Vendor=001f Product=0001 Version=0100
N: Name="PC Speaker"
P: Phys=isa0061/input0
S: Sysfs=/class/input/input3
H: Handlers=kbd event3 
B: EV=40001
B: SND=6