UL/cUL Listed, Conform to ANSI C12.1 national accuracy standards. Comes with a lower cover which has two 3/4" knockouts to connect the conduits. Confirmed by UL, fuse is not required when connecting the breaker of electric panel to the meter. P103-200 meter (or upgraded 3 Phase meter) and 2 100A split core CTs (CT-100SB) will be shipped. P153-200 KIT is ready for Cloud Metering (2nd picture) with DAE CC2030 Gateway. CC2030 will collect energy data from DAE electrical meters and send them to Cloud Server through Ethernet. With PC, cell phone or tablet, landlords or property managers can get access to real time data, monthly kWh and billing reports to their tenants. TOU (Time of Use) billing reports are also available. No IT guy required. Just connect wires as per a simple picture (see video) & ready to go. For existing building, hard to draw cable between electric meter (close to electric panel) and CC2030 (close to your router), please choose 1 CC2030 KIT + 2 WSC500A RF Conver