We've fixed some issue from the first batch and adding some new features:

1. adding ceramic antenna in order to reinforce the signal when external antenna is off.

2. fixed outside shape to have better identity and user friendly when adding breakout board.

3. adjust the screw hole so that the screw wont affect the nearby electronic.

4. fixed the silk print layout.

the new board seems awesome! just sent out to the manufacturer. Really cant wait to get the board on hand. XD