LG 55LN575V User Manual page 200

5 Move your hand left, right, up or down to select a function. Close and open
your fist to start the function.
6 If you lower your hand out of the range of motion recognition, the controller
disappears from the screen.
✎ If you clench your fist for more than one second, the selected function is
performed repeatedly until you open your hand.
✎ If you are watching TV using a set-top box, install an IR blaster (AN-
BL100, sold separately) to control the volume and the channel of the set-
top box using Motion Recognition.