What:		/sys/class/hidraw/<hidraw>/device/leds_mode
Date:		Jun 2014
KernelVersion:	3.17
Contact:	Janne Kanniainen <janne.kanniainen@gmail.com>
Description:
		Set the mode of LEDs

		0 - normal
		1 - audio
		2 - breathing

		Normal: LEDs are fully on when enabled
		Audio:  LEDs brightness depends on sound level
		Breathing: LEDs brightness varies at human breathing rate