1、Using industrial-grade electronic components and structural parts, so that the working temperature of the product can reach -30 - +75 ℃. 2、Super strong waterproof structure design, has the waterproof and dustproof grade of IP67. 3、The stainless steel front cover is made of 316L material, which can be used for a long time even in the environment of acid, alkali and humidity. 4、The whole series adopts ultra-wide working voltage design, long-term working voltage of 9-32V, up to 36V (≤1 minute). 5、Ultra-low power consumption design, Φ52mm series small table working current ≤60mm. 6、Applicable to various boats, RV, etc. accurate display of the sewage level, with high precision instructions, repeatable and versatility, reliability and stability, driving and control is relatively simple and so on.