Honeywell Thermostat, 20 - 30 VAC, 0.02 - 1 A Cool, 0.02 - 1 A Heat, 50/60 Hz, Manual Changeover, 1 Heat/1 Cool -Stage, Switch Position: Heat-Off-Cool (System), Auto-On (Fan), Relay Switch, Sensing Element: Thermistor, Round Display, Temperature Settings: 40 - 90 deg F, 5 - 90% RH Non-Condensing Humidity, 0.02 - 1 A Running Cool Current, Adjustable 1, 3, 5, 9 Cycles per Hour, +/-2 deg F Accuracy, 0.02 - 1 A Running Heat Current, Battery Assisted Power Stealing Power Source, Round Mounting, 1-3/4 in D x 3-11/16 in Dia, Premier White

• The round thermostats provide electronic control of 24 VAC heating and cooling systems with the classic twist to set dial
• Classic styling
• Button cell contained in equipment, lithium metal button cells only contained in equipment, excepted per PI970

• Instruction/Installation Manual https://assets.unilogcorp.com/267/ITEM/DOC/Honeywell_T87K1007_U_Instruction_Installation_Manual.pdf