Product Review

This converter uses MAX3232-based level shifter for converting TTL (Transistor-Transistor Logic) -level serial to standard RS232 serial. It's a convenient and cost-effective solution to convert RS232 into TTL, so you can connect equipment together based on your devices signal requirements.

Technical Specifications:
Type: DB9 male connector
Main chip: MAX3232
Operating voltage: 3.3V-5V
Interface: TX, RX, GND, VCC
Power supply: external
Operating current: 6mA
Suitable for use with most microcontrollers
Bauds: 300 to 115200
Size:

Package includes: 
2pcs RS232 DB9 Male Serial Port to TTL Module