If the LED indicator does not flash:

1. Relocate the repeater and/or Monitor/Sensor. The products must be within 330 ft (100 m) of each other.
2. Make sure products (Repeater, display, Monitors, Sensors) are placed at least 3 feet (.9 m) away from electronics that may interfere with the wireless communication (such as TVs, microwaves, computers, etc).
3. Use standard alkaline batteries (or lithium batteries in Repeater, Monitors, and Sensors when the temperature is below -4ºF/-20ºC). Do not use heavy duty or rechargeable batteries.

NOTE: It may take a few minutes for repeater and sensors to synchronize after batteries are replaced.