TX2U will monitor temperature only, a TX3U will monitor temperature and display the temperature on its LCD, and the TX3UP will monitor the temperature via a probe for use in pools, spas, etc.
2.Note: When setting up multiple units it is important to remove the batteries from all existing units in operation, then to insert batteries first into all the Remote Control Sender units, and in numeric sequence. Second install batteries into the Indoor Temperature Station. Transmission problems will arise if this is not done correctly and if the total time for
3.It is necessary to remove the batteries from all units currently in operation.
4.Remove the battery covers to all Remote Control Sender units.
5.Place all Remote Control Sender units in a numeric sequential order.
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