Hitachi RAK-18PSA Mode D'emploi page 11

PREPARE THE REMOTE CONTROLLER (continued)
WHEN OPERATING THE REMOTE CONTROLLER
Point the remote controller to the signal receiver of the unit
Signal reception distance is approximately 7m in front of the unit.
However, this distance may be shorter or the signal may not be
receivable if there is an electronic lighting device in the same room.
Handle the remote controller with care
Dropping it or getting it wet may compromise its signal transmission
capability. After new batteries are inserted into the remote controller,
the unit require approximately 10 seconds before it can respond to
commands and begin operation.
– 5 –
Approximately
7m from the front