1. 1.3 ft PL2303 USB to TTL serial adapter, 3.3 V logic level, with a 4pin 0.1 inch pitch female header socket. This adapter lets devices using 3.3 V UART signals connect to a laptop via USB, enabling reliable serial communication with minimal wiring. 2. 2.3 ft USB to TTL serial cable, 3.3 V, with 4 wires and flying leads. The leads provide direct access to UART signals: TX (transmit), RX (receive), VCC (5 V), and GND for flexible connections to embedded hardware and development boards. 3. Prolific chipset on the PCB board with configurable internal EEPROM. UART signals can be inverted individually by configuring the EEPROM, increasing compatibility with devices that require signal polarity adjustments. 4. 4pin TTL to USB converter cord is compatible with Windows 10, 8, 8.1, 7 (32 and 64bit), 2008/XP/Vista/CE. This USB 2.0 debug cord is suitable for Vendor ID rewrite, routers, GPS modules, set boxes, transmitters, and flashing firmware on hard drives, among other tasks. Key benefits and features Reliable USB to TTL bridge: supports 3.3 V logic level devices for stable serial communication with PCs and development tools. Flexible connection options: a headerbased 1.3 ft adapter for embedded boards and a 2.3 ft cable with flying leads for convenient access to TX, RX, VCC, and GND. Signal compatibility controls: EEPROMconfigurable UART signal inversion for broad device compatibility. Broad Windows support: works with major Windows versions and architectures, enabling easy integration into existing workstations for debugging and development. Practical for maintenance and development: ideal for vendor ID rewrite, firmware updates, device debugging, and serial console access on a range of hardware. Typical applications Firmware updates and troubleshooting on routers, GPS modules, set boxes, and other devices that expose a UART console. Debugging and programming of embedded systems and microcontroller projects that use 3.3 V TTL UART. Data collection and monitoring from UARTbased peripherals, or serving as a USB to serial console for devices requiring a 3.3 V interface. Notes Lengths provided correspond to 1.3 ft (headerready adapter) and 2.3 ft (flyinglead cable) options for convenient routing and spacing in assemblies. VCC reference indicates 5 V supply on the 4wire cable, while TX/RX operate at 3.3 V logic. The EEPROMbased inversion feature helps tailor the interface to devices with nonstandard UART polarity.