English 
1.The front cover is 316 stainless steel (corrosion resistance is obviously better than 304) .
2.The shell uses PBT+GF20%, the melting point is 220℃, high temperature resistance, Chemical and oil resistance.
3.Curved tempered glass (strength is 3~5 times higher than ordinary glass) .
4.High-transparency curved PC forms a double-layer anti-fog junction with curved glass Structure, anti-fog performance is much higher than single-layer glass coated anti-fogging agent.
5.The dial is made of PC material, high temperature resistance and high elasticity coefficient.
6. Waterproof and dustproof grade IP67
[Easy to install and Calibrate] 100TECH Boat Water Gauge is Designed for the One Who is Looking For a a Simple Solution to Measure the Amount of Water in The Tank But Un-sure of The Type Sensor That Was Installed Into Boat/Vehicles. It Can be Adjusted by Simply Pressing a Button.
[Easily Understood Wiring Instructions] Easy-to-Read Lighted Dial, The Installation Takes less than 15 Minutes. Install diameter: Φ52mm or 2-1/16'', Indication range: E~F, Working voltage: 9-32v dc [ fit 12V-24V Vehicle or Engine].
[ Wide Application] Signal Input : 0-190ohm, 240-33ohm, 240-30ohm, 0-180ohm, 10-180ohm.
[7 Colors Selection] This Marine Water Tank Gauge Includes Red(Default), Green, Blue, White, Yellow, Yellow Green, Orange, Purple Allow You to Match Your Factory Dashboard Lights or Add a Custom Style to the Interior of Your Boat/Vehicle.
[Precise on Gauge Reading, Firm Material] 316 stainless steel bezel with Double Layer Reinforced Convex glass. IP67 waterproof and Dustproof Grade.
