ITEM NAME:MAX3232 RS232 Serial Port to TTL Converter Module DB9 Connector With Cables Product Description Description: 100% Brand new and high quality. This module can be used to serial port of microcontroller module expand DVD, router, hard drive and other equipment to upgrade. The module is tested by STM32 development board 3.3V voltage 115200 baud rate before.This version is based on MAX3232, RS232 connector is female type. Included: 1 x MAX3232 Module. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.