Feature: ✅【Reliable and high-quality】: Made with durable materials, this adapter ensures a stable and reliable connection for downloading your STC programs. It is 100% brand new and of high quality, offering long-lasting performance. ✅【Easy and convenient to use】: The PL2303HX RS232 Upgraded Converter USB to COM/TTL Serial Adapter is a hassle-free solution for connecting your STC device to your computer. Simply plug it in and start downloading your programs. ✅【Versatile and compatible】: This adapter cable is designed specifically for STC Download, making it compatible with a wide range of STC devices. It is a perfect choice for hobbyists, students, and professionals alike. Win10 system is not supported. ✅【Portable design】: With its lightweight construction and compact size, this USB to COM/TTL adapter is easy to carry with you wherever you go. It measures 95cm in length, providing ample reach for normal use. ✅【Color-coded wires】: The wires in this adapter cable are color-coded, making them easy to distinguish and connect correctly. This ensures a hassle-free and error-free setup. Specifications: Type: USB to COM; USB to TTL Length: 95cm/37.4in Weight: 28g(approx.) Wire Definition: Red: +5V Black: GND Green: TXD White: RXD Package Includes: 1 x Adapter Cable Note: Please allow small size error due to manual measurement. Thanks for your understanding. ✅【Reliable and high-quality】: Made with durable materials, this adapter ensures a stable and reliable connection for downloading your STC programs. It is 100% brand new and of high quality, offering long-lasting performance. ✅【Easy and convenient to use】: The PL2303HX RS232 Upgraded Converter USB to COM/TTL Serial Adapter is a hassle-free solution for connecting your STC device to your computer. Simply plug it in and start downloading your programs. ✅【Versatile and compatible】: This adapter cable is designed specifically for STC Download, making it compatible with a wide range of STC devices. It is a perfect choice for hobbyists, students, and professionals alike. ✅【Portable design】: With its lightweight construction and compact size, this USB to COM/TTL adapter is easy to carry with you wherever you go. It measures 95cm in length, providing ample reach for normal use. ✅【Color-coded wires】: The wires in this adapter cable are color-coded, making them easy to distinguish and connect correctly. This ensures a hassle-free and error-free setup.