1. The semi-liquid cover plate is clearer. The counter part is vacuum treated and isolated from the outside air and the measured water, so it is not easy to atomize to keep the counter clear. 2. Enlarge the inner cavity and reduce pressure loss. Under the condition of ensuring performance, the increase of the water inlet and outlet holes of the impeller box can effectively reduce the pressure loss of the water meter. 3. Install lead seals to prevent water stealing. The lead seal is added after strict inspection before leaving the factory, which means that the product is qualified, and it can also prevent tampering and increase safety. 4. High standards guarantee sensitivity. Accurate to 0.0001, combined display of numbers and pointers. 5. All copper fittings. Anti-rust full copper joints, equipped with leak-proof sealing ring.