Osoto NV-1920 - Manual (Page 21)

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will hear of a short voice “Bee” (if some projectors need 2 seconds
to turn on, users need press remote controller more than 2
seconds to decode.),and indicator will be on;
4. Decode projector
’s off: Put projector’s remote controller
opposite to visual
presenter’s infrared receiver window, press
Button
, and will hear of a short voice “Bee”,
indicator will be off.
Put projector
’s remote controller opposite to infrared receiver
window, press
“Off”, and will hear of a short “Bee”, indicator will be
on;