Excelence: High sensitivity. Indicator is stable. Capability is trusty. Graguation is clear. Liquid can not be emulsified for very long time, and do not change color. Prevent magnetism, equipped with self-adjusting units, have favorable preventing magnetism function, equiped with illumination set, night works is convenient. The capability of the product, entirely accord with ISO**4 9A CLASS and GB******3A CLASS technical requirement . Model: CPQ***0 Material: special imported plastic raw material, imported pernament magnetism material, handtailor senior compass liquid. Excelence: High sensitivity. Indicator is stable. Capability is trusty. Graguation is clear. Liquid can not be emulsified for very long time, and do not change color. Prevent magnetism, equipped with self-adjusting units, have favorable preventing magnetism function, equiped with illumination set, night works is convenient. The capability of the product, entirely accord with ISO**4 9A CLASS and GB******3A CLASS technical requirement . Lighting voltage: *2V/*4V Dial diameter: *5mm Using of the environment temprature: **0℃ to **0℃ At the error: not more than 1.5℃ .The scope of application:Apply to small and medium sized civilian ships and yachts for the standard magnetic compass for obvious in the position to guide course.