Removed and replaced 3 smoke detectors using company provided smoke/carbon 10 year sealed battery detectors. Also replaced all devices on bathroom plug and outside/unfinished plugs with gfcis and new covers so outdoor plugs would not interfere with bathroom plugs. Installed 4 new switches that had broken internally. 1 in master bath toilet area for sconce light, 1 in powder room on main level for light, 1 in living room for scr and the last in the basement for the light in the laundry room. Will return to put last cover on receptacle on back porch and replace one more receptacle in bedroom. verified proper operation of all completed work with customer.