Neal Williams April 5, 2021 Make sure you have hardwired smoke detectors in your property to pass your Baltimore City and County Rental Inspection. Neal Williams April 5, 2021 Don't have wiring for hardwired smoke alarms in your rental property? In Baltimore City these battery operated combination alarms are acceptable. Just put them on the wall. (In Baltimore County they do need to be hardwired.)443-629-0893