ITEM NAME:RS232 Serial Port To TTL Converter Module MAX3232 5V / 3.3V W / Jump Cables C2B7 RS232 Serial Port To TTL Converter Module MAX3232 5V / 3.3V W / Jump Cables C2B7 Smart MAX3232 integrated Power supply: 3.3 V or 5 V Compact design. Output signals: VDD, TXD, RXD, RTS, CTS GND Fully compatible with existing legacy COM port software The product descriptions Colour:As shown RS232 TTL Module Converter Features: It is small RS232 TTL Serial converter module level, adapted to all devices of 3.3V or 5v targets. Built in chip MAX3232 Compact design. Packing included: 1 x RS232 TTL Module Converter 4 x DuPont wire Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.