Devices in need of replacement are addressable part number: 4906-9230 the devices I was sent with were 4906-9130 non-addressable. Customer had (2) in stock used (1) for device in building 4. Building 5 devices was written up as RM S181 located on ceiling, there are more than one device in this room. Will need to gather more information from the inspectors before replacement is made. Customer would like us to also order the correct part so he can refill his stock. Nathan-2hrs