1. With Transient Voltage Suppression Protector 2. Compatible With RS-422&8RS-485 Standard, Can Convert Single-Ended Pci-E Signal Into Four RS-422/RS-485 Signals 3. With Fast Transient Voltage Suppression, Effectively Protect The RS-422/RS-485 Interface 4. Suppress-Lightning And Esd, Provide 600w Lightning-Surge Protection Power Per Line 5. It Can Reduce The Impedance At Both Ends At A High Speed And Absorb A Large Current, Thereby Clamping The Voltage At Both Ends To A Predetermined Value And Protecting The Subsequent Circuit Components From Being By Transient High Voltage Shocks. Interface:Serial Port Chip:AX99100 Type:Multi-Serial Card Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Number Of Branch Connectors:One For Two Type:2 Ports Colour:As Shown Material:Plastic Size:Line Length:20cm; Chip Size:10.5x5.5cm Package Contents: 1 * Serial Card Converter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.