Aube by Honeywell Home TH135-01-B/U Hydronic Heating Non-Programmable Thermostat

Compatible with hydronic floor heating and central heating; also compatible with electric heat applications using a relay (see accessories)

2-Ampere (inductive) 24-Volt R, W Millivolt compatible

Remote input enables change of temperature modes by phone (Telephone controller required - Aube by Honeywell CT240)

Low battery indicator gives 60-day warning to replace battery (2 'AA' batteries required)

Dimensions (height by width by depth): 3.1-Inch by 3.1-Inch by 0.8-Inch