User's Manual

it:
1 open the crust of the 15920 and replace the cell in it
2 make sure the 15920 work normally and can make the 15901R alarm
3 envelop the crust of the 15920
This device complies with part 15 of the FCC Rules. Operation is subject
to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate
the equipment.