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New Old Stock Penn T25A-1, 2 Stage Heating, 2 Stage Cooling Room Thermostat. Can be used in 24 Volt low voltage control systems or line voltage control systems. The unit you will receive is the exact unit in the pictures and comes only with what is shown, no box or paperwork, however we will print and send instructions with unit upon request. Unit has been tested and functions exactly as should. Any questions will be answer as quickly as possible to the best of our knowledge. Thanks for looking.