Product Description

This adapter helps to convert TTL (Transistor-Transistor Logic) level signals to RS232 interface. This converter has a Male DB9 connector.
Suitable for use with most microcontrollers， 300 to 115，200 bps (up to 230，400 bps).
Compatible with Arduino， Raspberry Pi， and any micro controller， such as PIC， Atmel， STM or other system with TTL serial communications.
Operate with 3V to 5.5V power supply. You can use this on both your 3.3V and 5V projects.
Perfect for any RS232 to TTL electronic projects.
Manual: http://www.nulsom.com/datasheet/NS-RS232_en.pdf

Feature

Ultra compact board size:15 x 14 mm
DB9 Male Connector (RS232)
Supports 3V to 5.5V power supply (You can use this on both your 3.3V and 5V projects.)
Includes SP3232E
4 pin through hole: GND， Logic out (TX)， Logic In (RX)， VCC (3V to 5.5v) and 2 pin through hole: CTS， RTS
Item model num : NS-RS232-02