A.
The above diagram shows the usable range of the D Beam controller. Waving your hand outside this range will produce no effect. The D Beam indicator will light when the D Beam controller is responding. The D Beam indicator will not light if you are outside the valid range of the D Beam controller.
You can change the size of usable range of the D Beam controller when needed.
CAUTION: The usable range of the D Beam controller will become extremely small when used under strong direct sunlight. Please be aware of this when using the D Beam controller outside.
(2003/08/22)