6SETUPSet the A-B-C SwitchThe A-B-C switch is located insidethe battery compartment. It canbe set to A, B or C. However,you must select the same letterchoices for both the sensor andthe display unit in order for theunits to synchronize.Install or Replace BatteriesAcuRite recommends high qualityalkaline or lithium batteries inthe outdoor sensor for the bestproduct performance. Heavy dutyor rechargeable batteries are notrecommended.The sensor requires lithiumbatteries in low temperatureconditions. Cold temperaturescan cause alkaline batteriesto function improperly. Uselithium batteries in the sensor fortemperatures below -4ºF / -20ºC.1. Slide off the batterycompartment cover. Take noteof the A-B-C switch settinginside the battery compartmentfor display unit setup.2. Insert 2 x AA batteries intothe battery compartment, asshown. Follow the polarity(+/-) diagram in the batterycompartment.3. Replace the battery cover.Sensor Setup211 A-B-C Switchset to matchdisplay unit2 Install Batteries2 AA batteriesA B C