[Applicable types]: N41X N51X series-N410, N412, N510, N512. N6X series-N611, N621, N621F, N623, N624, N641, N641F, N643. N8X series-N811, N821, N821F, N821V, N822, N822F, N823, N824, N841, N841V, N842, N843. NX/NXA series-NX611, NX641, NXA641, NX811, NX841, NXA841. N1095 series, 1200 series, 1210 series, 1211 series. [Function]: After the product is installed, it can that each cooling system is always in normal operation. [Part number]: 628661 The panel is on the outside of the RV and is easily by rain and snow. After the nano waterproof coating is sprayed and dried on the electronic circuit board, a transparent and colorless molecular waterproof film chain can be formed in the water and attached normally. Protective parts so that water does not contact the protective parts. [Material]: The refrigerator power circuit board is made of and wear- materials.