evtest 
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:	Lid Switch
/dev/input/event1:	Power Button
/dev/input/event2:	AT Translated Set 2 keyboard
/dev/input/event3:	Video Bus
/dev/input/event4:	Video Bus
/dev/input/event5:	SynPS/2 Synaptics TouchPad
/dev/input/event6:	Sony Vaio Keys
/dev/input/event7:	Sony Vaio Jogdial
/dev/input/event8:	HDA Intel MID Mic
/dev/input/event9:	HDA Intel MID Headphone
/dev/input/event10:	HDA NVidia HDMI/DP,pcm=3
/dev/input/event11:	HDA NVidia HDMI/DP,pcm=7
/dev/input/event12:	HDA NVidia HDMI/DP,pcm=8
/dev/input/event13:	HDA NVidia HDMI/DP,pcm=9
/dev/input/event14:	UVC Camera (05ca:18b7)
/dev/input/event15:	FutureMax Dance Mat
Select the device event number [0-15]: 15
Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x54c product 0x268 version 0x111
Input device name: "FutureMax Dance Mat"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 288 (BTN_TRIGGER)
    Event code 289 (BTN_THUMB)
    Event code 290 (BTN_THUMB2)
    Event code 291 (BTN_TOP)
    Event code 292 (BTN_TOP2)
    Event code 293 (BTN_PINKIE)
    Event code 294 (BTN_BASE)
    Event code 295 (BTN_BASE2)
    Event code 296 (BTN_BASE3)
    Event code 297 (BTN_BASE4)
    Event code 298 (BTN_BASE5)
    Event code 299 (BTN_BASE6)
    Event code 300 (?)
    Event code 301 (?)
    Event code 302 (?)
    Event code 303 (BTN_DEAD)
    Event code 704 (BTN_TRIGGER_HAPPY1)
    Event code 705 (BTN_TRIGGER_HAPPY2)
    Event code 706 (BTN_TRIGGER_HAPPY3)
  Event type 3 (EV_ABS)
    Event code 0 (ABS_X)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 1 (ABS_Y)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 2 (ABS_Z)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 5 (ABS_RZ)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 40 (ABS_MISC)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 41 (?)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 42 (?)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 43 (?)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 44 (?)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 45 (?)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 46 (?)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 47 (ABS_MT_SLOT)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 48 (ABS_MT_TOUCH_MAJOR)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 49 (ABS_MT_TOUCH_MINOR)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 50 (ABS_MT_WIDTH_MAJOR)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 51 (ABS_MT_WIDTH_MINOR)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 52 (ABS_MT_ORIENTATION)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 53 (ABS_MT_POSITION_X)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 54 (ABS_MT_POSITION_Y)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 55 (ABS_MT_TOOL_TYPE)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 56 (ABS_MT_BLOB_ID)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 57 (ABS_MT_TRACKING_ID)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 58 (ABS_MT_PRESSURE)
      Value      0
      Min        0
      Max      255
      Flat      15
    Event code 59 (ABS_MT_DISTANCE)
      Value      0
      Min        0
      Max     1023
      Fuzz       3
      Flat      63
    Event code 60 (ABS_MT_TOOL_X)
      Value      0
      Min        0
      Max     1023
      Fuzz       3
      Flat      63
    Event code 61 (ABS_MT_TOOL_Y)
      Value      0
      Min        0
      Max     1023
      Fuzz       3
      Flat      63
    Event code 62 (?)
      Value      0
      Min        0
      Max     1023
      Fuzz       3
      Flat      63
  Event type 4 (EV_MSC)
    Event code 4 (MSC_SCAN)
  Event type 21 (EV_FF)
    Event code 80 (FF_RUMBLE)
    Event code 81 (FF_PERIODIC)
    Event code 88 (FF_SQUARE)
    Event code 89 (FF_TRIANGLE)
    Event code 90 (FF_SINE)
    Event code 96 (FF_GAIN)
Properties:
Testing ... (interrupt to exit)