1、100% brand new and high quality. 2、This is a USB to COM/TTL adapter cable for STC Download. 3、Total about 1 meter long cable is enough for normal need. 4、Convenient to use, light weight for easy carry. 5、The wires can be distinguished by different colors. Features: 100% brand new and high quality. This is a USB to COM/TTL adapter cable for STC Download. Total 95cm long cable is enough for normal need. Convenient to use, light weight for easy carry. The wires can be distinguished by different colors. 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.