Honeywell's PRO 4000 offers basic programmable comfort. The PRO 4000 offers easy-to -use slide switches to select fan mode and heat or cool modes. The PRO 4000 maintains consistent comfort at the highest level of accuracy. The PRO 4000 offers programmable 5 day work week and 2 day weekend scheduling. The PRO 4000 has a built-in pull-out instruction manual.