High quality brand new 4 pin TTL to USB Converter cord is compatible with Windows 10, 8, 8.1, 7 (32, 64-bit), 2008/XP/Vista/CE; ideal USB 2.0 debug cord for Vendor ID re-write, router, GPS, set top box, transmitter, flash firmware on hard drive, etc.A genuine PL2303TA chip module is housed in USB 2.0 type A male terminal for wider compatibility and supports reliable data transfer ratesProlific chipset on the PCB board has configurable internal EEPROM and UART signals can be individually inverted by configuring the EEPROM3ft PL2303 USB to TTL serial adapter 3V3 (with 4 pin 0.1 pitch female header socket) connects devices with 3.3 V logic level UART signals interface to a laptop via USB port3 feet USB to TTL serial cable 3.3V (4 way output flying leads ) provides access to UART (transmit) Tx, (receive) Rx, VCC (5V) and GND