It allows output temperatures beyond the factory settings shows error codes, and monitors incoming and outgoing water temperatures.
(95, 100, 102, 104, 106, 108, 110, 111, 113, 115, 117, 122, 131, 140, 158, 167F)

Takagi Temperature Remote Controller
Model TK-RE02

For Use With All Takagi Water Heaters Excluding The Mobius T-M1 AND tk3 Models