Features 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 Block Board Size: Approx. 33 x 25mm / 1.3 x 0.98in Definition 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