Feature:1. Easy Working: Converting DB9 male header to screw connector, adding more convenience to the connection.2. 9 Pin Design: Comes with 9 pin, and each pin has its own specific definition and symbols, very useful.3. Stable Using: Ensuring good conversion performance and smooth communication, also has high efficiency.4. Great Durability: Choose high quality components, not easy to malfunction, durable for long term using.5. Quick to Install: Comes with a light weight and a compact size, the installation is quick and simple.Specification:Item Type: Terminal BlockBoard Size: Approx. 33 x 25mm / 1.3 x 0.98inDefinition and Symbols of Pin: 1: DCD, Data Carrier Detect; 2: RXD, Received Data; 3: TXD, Transmit Data; 4: DTR, Data Terminal Prepared; 5: SG, Signal Ground; 6: DSR, Data Set Prepared; 7: RTS, Request To Send; 8: CTS, Clear To Send; 9: RI, Ring Indicator; .Package List:1 x Terminal Block