Features:1. Compatible with various serial communication tasks, including router/ADSL firmware updates, GPS data transfer, hard drive upgrades, and microcontroller programming.2. Built with PL2303HX/TA chip for stable performance; supports both 3.3V and 5.0V output (configure before use; VCC not required for upgrade-only operations).3. Clear wire definition: Red (+5V), Black (GND), Green (TXD), White (RXD) for easy identification and correct connection.4. No MAX232 converter needed; connect RX to target TX, TX to target RX, and GND to GND. Swap RX and TX if communication fails.5. Always disconnect from computer before changing voltage; avoid live connections; never connect GND to a voltage pin or link RX/TX to VCC pins to prevent damage.Product Details:This 1-meter black USB to TTL UART cable uses the PL2303HX/TA chip for reliable serial communication. It is commonly used with serial debugging tools, HyperTerminal, satellite receiver upgrades, and microcontroller programming. For basic firmware updates, only RX, TX, and GND are typically needed (VCC not required). Refer to the target device’s pinout to ensure safe and correct connections.Specifications:- Chip: PL2303HX / PL2303TA- Cable Length: 1 meter- Color: Black- Interface: USB to TTL UART- Included: 1 x download cable