They have different meanings and blurting characteristics. According to the query, Zhengtai Home official website displays them.

1. Different meanings: black logo of Chint switch stands for nobility and stability. Blue is the representative color of science and technology, symbolizing the brand's high technology.

2. The blurting characteristics are different: the black blurting is 5 to 11 times the rating. The blue one is rated 3 to 5 times.