Lux TX9000TS 7 day programmable thermostat for heat and air conditionerENERGY STAR rated.A copy of the operator's handbook is consisted of with the item.There are no issues with the unit, however it isn't suitable with the two stage a/c device I just recently had installed in my residence. It just works with a one stage system.See information about the item at: /dp/B000I7MANA/ref=asc_df_B000I7MANA3472370?smid=ATVPDKIKX0DER&tag=pg-1592-86-20&linkCode=df0&creative=395097&creativeASIN=B000I7MANA /support/TX9000TS_ENG_LARGE-SIZE.pdf.