sudo evtest

````
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:	AT Translated Set 2 keyboard
/dev/input/event1:	AKKO AKKO 3084BT
/dev/input/event2:	AKKO AKKO 3084BT Keyboard
/dev/input/event3:	AKKO AKKO 3084BT Wireless Radio Control
/dev/input/event4:	AKKO AKKO 3084BT Consumer Control
/dev/input/event5:	AKKO AKKO 3084BT
/dev/input/event6:	Integrated Camera: Integrated C
/dev/input/event7:	Logitech M350
/dev/input/event8:	ITE Tech. Inc. ITE Device(8910) Keyboard
/dev/input/event9:	ITE Tech. Inc. ITE Device(8910) Consumer Control
/dev/input/event10:	ITE Tech. Inc. ITE Device(8910) Wireless Radio Control
/dev/input/event11:	Lid Switch
/dev/input/event12:	Power Button
/dev/input/event13:	Power Button
/dev/input/event14:	Video Bus
/dev/input/event15:	Video Bus
/dev/input/event16:	PC Speaker
/dev/input/event17:	Elan Touchpad
/dev/input/event18:	MSFT0001:00 04F3:3140
/dev/input/event19:	Ideapad extra buttons
/dev/input/event20:	HDA NVidia HDMI/DP,pcm=3
/dev/input/event21:	HDA NVidia HDMI/DP,pcm=7
/dev/input/event22:	HDA NVidia HDMI/DP,pcm=8
/dev/input/event23:	HDA NVidia HDMI/DP,pcm=9
/dev/input/event24:	HDA NVidia HDMI/DP,pcm=10
/dev/input/event25:	HDA Digital PCBeep
/dev/input/event26:	HD-Audio Generic Mic
/dev/input/event27:	HD-Audio Generic Headphone
Select the device event number [0-27]: 17
Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x4f3 product 0x3140 version 0x100
Input device name: "Elan Touchpad"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 272 (BTN_LEFT)
    Event code 325 (BTN_TOOL_FINGER)
    Event code 328 (BTN_TOOL_QUINTTAP)
    Event code 330 (BTN_TOUCH)
    Event code 333 (BTN_TOOL_DOUBLETAP)
    Event code 334 (BTN_TOOL_TRIPLETAP)
    Event code 335 (BTN_TOOL_QUADTAP)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value      0
      Min        0
      Max     3209
      Resolution      31
    Event code 1 (ABS_Y)
      Value      0
      Min        0
      Max     2097
      Resolution      31
    Event code 24 (ABS_PRESSURE)
      Value      0
      Min        0
      Max      255
    Event code 47 (ABS_MT_SLOT)
      Value      0
      Min        0
      Max        4
    Event code 53 (ABS_MT_POSITION_X)
      Value      0
      Min        0
      Max     3209
    Event code 54 (ABS_MT_POSITION_Y)
      Value      0
      Min        0
      Max     2097
    Event code 57 (ABS_MT_TRACKING_ID)
      Value      0
      Min        0
      Max    65535
    Event code 58 (ABS_MT_PRESSURE)
      Value      0
      Min        0
      Max      255
Properties:
  Property type 0 (INPUT_PROP_POINTER)
  Property type 2 (INPUT_PROP_BUTTONPAD)
Testing ... (interrupt to exit)

````

sudo evtest (I choose 18)

````
Input driver version is 1.0.1
Input device ID: bus 0x18 vendor 0x4f3 product 0x3140 version 0x100
Input device name: "MSFT0001:00 04F3:3140"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 256 (BTN_0)
    Event code 272 (BTN_LEFT)
    Event code 273 (BTN_RIGHT)
    Event code 330 (BTN_TOUCH)
  Event type 2 (EV_REL)
    Event code 0 (REL_X)
    Event code 1 (REL_Y)
    Event code 6 (REL_HWHEEL)
    Event code 8 (REL_WHEEL)
    Event code 11 (REL_WHEEL_HI_RES)
    Event code 12 (REL_HWHEEL_HI_RES)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value      0
      Min        0
      Max     3209
      Resolution      32
    Event code 1 (ABS_Y)
      Value      0
      Min        0
      Max     2097
      Resolution      32
    Event code 40 (ABS_MISC)
      Value      0
      Min        0
      Max       15
  Event type 4 (EV_MSC)
    Event code 4 (MSC_SCAN)
Properties:
Testing ... (interrupt to exit)
````