specification:<br />100% <br />this module can be used to serial port of microcontroller module expand dvd， router， hard drive and other equipment to upgrade.<br />it is used in radio modification， phone flash， xbox360 flash， gps， vehicle detection dvd flash， hard disk repair set-top box upgrade<br />it can be used to program stc mcu， nxp mcu， renesas mcu， stm32 mcu， n+-2ec mcu<br />communication chip: domestic max3232<br />workingvoltage: 3.3v-5.5v<br />port: tx rx vcc gnd<br />matched rs232 uart extension line<br />size: approx. 4.5 x 3cm (l*w)<br /><br />note: the dupont cable' color is random .<br /> <br />package included:<br />100% <br />2 x module<br />2 x 2 port 4 pin 20cm dupont cable