1. On-board MSP430F169 chip.

2. On-board JTAG interface and reset buttons.

3. On-board 32.768KHZ and 8MHZ crystal.

4. With a 5V to 3.3V chip AMS1117-3.3.

5. With an RS232 serial port (MAX3232 chip), the default female.

6. With a 4 programmable LED.

7?With a four button.

8?PCB Size: 69.4MM * 62MM.