Fujitsu 628WSL110H2 User Manual page 21

・IrDA light-receiving and sending part
This is for sending and receiving data by way of IrDA communications.
* Do not peep into through IrDA communication window. Especially, pay special attention when
communication is being carried out.
For data transmission, use under the following conditions:
Transmission distance:
300 mm (angle ± 15°)
600 mm (angle ± 8°)
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