5PCS mini RS232 MAX3232 Levels to TTL level converter board serial converter board Dropshipping<br><br><br>Chip: domestic MAX3232CSE<br>Voltage range: 3 v to 5 v<br>High baud rate: higher than 120 KBPS is not recommended<br>Size: 9.4 mm * 15.9 mm<br>Below