Step-Hear CALL-HEAR CH-105-F, User Manual, Page: 10 / 76

INSTALLATION
Ensure the Call Unit is placed in a location which is
easily accessible and useful for a person in need of
assistance. For wheelchair users, the ideal height for
the Call Unit is 90cm to 100cm from the ground.
Setting up the Indoor Unit (IDU)
Open the battery compartment and insert the 4 AA
batteries supplied. Ensure correct polarity is observed.
Close the battery compartment. Alternatively, connect
the mains adaptor (not supplied) into the mains power
socket then plug the other end into a suitable wall
socket.
Ensure the Indoor Unit (IDU) is placed in a location
where someone will notice the flashing light and hear
the alarm in order to go and assist the person in need.
The Call-Hear range is approximately 60-80m in free
space and approximately 30m where there are walls or
other obstructions.
10