What are the main types of children's watches? Please popularize it

1, call class, this class of watch main call function, call quality is relatively high.

2: positioning class, mainly to protect the child's safety, a lot of positioning watches are using quadruple positioning, such as the Ubi watch;

3: learning class, now on the market is relatively rare in a class of products, learning language, math, English, to the Ubi watch as a representative!

4: the most basic electronic watch, mainly used to see the time, set the alarm clock and so on.