Features 4 INTERFACES: With four interfaces VCC, GND, RXD and TXD, the line length is 50 cm, the connection is flexible and easy to use. FOR MAX3232 CHIP: This is an RS232 to TTL converter module that uses an operating voltage of 3.3V to 5V for the MAX3232 communication chip. Wide range of applications: used in radio modifications, mobile phone flashing, XBOX360 flashing, GPS, car inspection, DVD flashing, hard drive repair, set-top box upgrade. SUPPORT VARIOUS MICROCONTROLLERS: The microcontroller types available for programming are for STC, STM32 and NXP. Compatible with many systems: compatible with microcontroller systems with serial TTL communication. Specification: Element Type: Serial Port Converter Module Cable length: approx. 50 cm Function: RS232 to TTL Operating voltage: 3.3 V ~ 5 V. Four interfaces: VCC, GND, RXD, TXD Communication chip: For MAX3232 chip Package list: 1 x Serial Port Converter Module Package List 1 x Serial Port Converter Module