Rinnai Wireless Starter kit includes a transceiver and wireless controller. This gives you remote control of the precise temperature for your Rinnai Infinity.
Avoid Temperature Fluctuations
Continuous Flow water heaters like all types of water heaters can experience temperature fluctuations when other taps are turned on. Water controllers avoid this by maintaining an exact temperature even when other taps are used or a toilet is flushed.
In a fully wireless setup, you can add up to 3 additional wireless remote controllers (one is designated Master Controller) or use wireless in combination with wired remotes (limited to 4 total and only certain combinations are supported)