net-wireless/bluez/files/99-uhid.rules - third_party/overlays/chromiumos-overlay - Git at Google

 # Make the /dev/uhid device only accessible by the Bluetooth daemon user
 # and the 'bluetooth' group for additional daemons (e.g. u2fd or WiFi Direct?)
 # providing HID transport.
 KERNEL=="uhid", OWNER="bluetooth", GROUP="bluetooth", MODE="0660"
	# Make the /dev/uhid device only accessible by the Bluetooth daemon user
	# and the 'bluetooth' group for additional daemons (e.g. u2fd or WiFi Direct?)
	# providing HID transport.
	KERNEL=="uhid", OWNER="bluetooth", GROUP="bluetooth", MODE="0660"