I have been navigating for a long time. Among these brands, Castrol, which I have always recognized, has first-class after-sales service and a 2-year warranty, and is a well-known trademark in China. The first brand in the industry.

Followed by Huayang, the quality is also first-class, and it is a big factory product, but because the manufacturer does not focus on navigation, it has fewer functions. But Huayang has money and CCTV has advertisements.

Kejunda and Casta are from the same manufacturer.

Lotus is no good, but the recent products of 1 are almost the same, and the previous ones are useless at all, and there are too many after-sales products.