1.Weight:42g.

 2.Working voltage :3.3 V / 5 V is optional.

3.Maximum current:500 mAh.

4.Support: 7-23 v input.

5.Use external power supply:at most 2 a 5 v.

6.Power supply.

7.More stable AD sampling.

8.Easier to press the reset button.

9.The expansion of the pin leads.