SECUTEST is designed for the measurement and inspection of operation safety of electrical equipment, including the audit of safety and efficacy of electric, medical and welding devices. It provides all predefined and programmable test procedures. And the selection of programs can be quickly obtained through an intuitive dual physical knob, which can automatically pop up the menu. In a word, the elaborate design of the product and its usability have made it the classic brand in this field, and its marketability and high value, thus, bring it well-known brand. The PI strategy is fully considered in our design, which enables the brand of its high-value products to be passed down. The product is designed with solidness and durability for multi-injection process makes it rugged and reliable, suited for construction or engineering environments, especially for movements and operation under harsh conditions. The handle is robust, not only for transportation, but also for tilt, which greatly improves efficiency. The dark product interface is a complex menu system with an anti-staining and dust-proof, 4.3-inch high-resolution color screen. Its display is intelligent and reliable after UID design and procedural, cognitive usability evaluation.