Install batteries
Insert 2 AA batteries in the battery compartment. The LED indicator on the
back of the transmitter will turn on for four seconds and normally flash once
every 16 seconds (the sensor transmission update period).
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If no LED light up or is permanently on, make sure the batteries are inserted
the correct way or a proper reset has happened. Do not install the batteries
backwards. You can permanently damage the outdoor sensor
Note: We recommend 1.5V lithium batteries for cold weather climates,
but alkaline batteries are enough for most climates. We do not recommend
rechargeable batteries. They have lower voltages, they do not operate well
at wide temperature ranges, and do not last as long, resulting in poorer
reception.
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