I am doing Mercari as a hobby, so I welcome price reduction requests within a reasonable range. Please make price reduction requests not from the comment section, but from "Price Reduction Request" at the bottom right of the product image. We will not respond to price reduction requests from the comment section. Also, we do not ship on weekends and holidays. Thank you for your understanding. This is an "ET10G-PCIE" 10 Gigabit & Multi Gigabit compatible LAN adapter made by I-O Data Device. By adding it to the PCI Express slot of a desktop PC, high-speed network communication of up to 10Gbps (theoretical value) becomes possible. It is ideal for transferring large files and building a high-speed internet environment. ■ Basic Specifications • Manufacturer: I-O DATA (アイ・オー・データ機器) • Model Number: ET10G-PCIE • Supported standards: 10GBASE-T / 5GBASE-T / 2.5GBASE-T / 1000BASE-T / 100BASE-TX • Connection Interface: PCI Express 2.0 (Gen 2) x4 • MAC Address: 34:76:C5:93:23:5C ■ Product Condition • While there are no noticeable large scratches on the board or bracket, please understand that this is a used PC part and may have slight dust or signs of use. (Please check the photos for details) • ※We cannot guarantee operation in your PC environment due to compatibility issues, etc., so please consider purchasing only if you are familiar with handling PC parts. ■ Accessories • The main unit of the LAN card shown in the photo is included. • ※A standard-sized bracket (mounting hardware) is attached. LowProfile brackets for space-saving PCs, outer boxes, manuals, etc. are not included. • Various drivers etc. can be downloaded from the official support page of I-O DATA DEVICE.