$ sudo evtest
[sudo] password for tj: 
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:      Lid Switch
/dev/input/event1:      Sleep Button
/dev/input/event2:      Power Button
/dev/input/event3:      AT Translated Set 2 keyboard
/dev/input/event4:      Asus WMI hotkeys
/dev/input/event5:      Video Bus
/dev/input/event6:      HDA Intel HDMI HDMI/DP,pcm=3
/dev/input/event7:      HDA Intel HDMI HDMI/DP,pcm=7
/dev/input/event8:      HDA Intel HDMI HDMI/DP,pcm=8
/dev/input/event9:      HDA Intel PCH Headphone
/dev/input/event10:     ASUS T300CHI DOCKING
/dev/input/event11:     Yubico Yubikey NEO OTP+U2F+CCID
/dev/input/event12:     USB2.0 HD UVC WebCam
/dev/input/event13:     SYNAPTICS Synaptics Touch Digitizer V04
/dev/input/event14:     SYNAPTICS Synaptics Touch Digitizer V04 Pen
/dev/input/event15:     Bluetooth Travel Mouse
Select the device event number [0-15]: ^C