Peace, mercy, and blessings of God be upon you. As is clear from the advertisement, a TP-Link Wi-Fi extender is for sale. Model: RE815XE. The device is very, very clean, with no problems whatsoever. I guarantee it for the buyer for 3 days. If there is any issue, I will refund the amount, provided I receive it in the same condition as it was received. The original box is not included. The modem is clean and free from any issues, like new. Of course, the modem has the ability to receive internet from the main modem or an extender. It covers an excellent area, reaching the second floor. It is important to distribute the modem or extender between the floors for better coverage. Distribution is smarter and better. Its features: It supports 3 bands: 2.4GHz, 5GHz, and 6GHz. They all connect automatically and transmit data efficiently between the main modem or the extender at AC5400 speed. This feature prioritizes according to the powerful devices and organizes the paths. Its benefit is maintaining ping stability and ensuring connected devices are not affected under load from simultaneous use without affecting or reducing the modem's performance by opening up three massive paths without any user feeling lag or slowness during use. For example, 2 TVs streaming in 4K resolution at the highest bitrate for quality, 2 gaming devices for streaming or online play, 4 social media devices, and 4 devices for studying and watching lectures simultaneously. The modem remains stable and efficient without being affected. It contains four powerful FEM antennas for high transmission.