Usage and properties: 1) Suitable for the connection and wiring between the main cable and the branch cable of cities, countryside and enterprises 2) The module can be overturned resulting in easy operation and maintenance 3) The way of the junction for the module applies screw and plug-in 4) Apply a small metal sword inside the cap of the screw junction to improve the times for cutting 5) The cap of the screw junction has a good ability for airproof which can protect the junction from being corroded by deleterious gas 6) The testing tongue is outside resulting in easy test Main technical indexes: 1) Environmental temperature: -55°C - +60°C 2) Relative humidity: