Features: Default setting:ATMG328 5V 16M 1. Fully compatible with the official website module. 2. Increased A6, A7 mouth on the basis of the original. 3. Increased a power output on the basis of the original 4 . Increased prevent reverse the diode to protect the USB port on the basis of the original 5. Increased Restoring self-insurance o prevent short circuits on the basis of the original Machine welding process, large spot!