This device is a Wi-Fi Range Extender from D-Link, model DAP-1325 (N300). Its Function: It strengthens the internet signal (Wi-Fi) and expands its coverage in the house, especially in places where the internet is weak or cuts out. How to Use It Briefly: 1. Plug it into the electricity near the router the first time. 2. Press the WPS button on the router, then press the WPS button on the device (if your router has it). * Or you can set it up manually via your phone by connecting to the device's network. 3. After connecting, move it to a location midway between the router and the weak area. 4. You will see a new network name (or the same name) with a stronger signal.