Ultra-fast DOCSIS 3.1 performance - Model MB8611 supports the fastest DOCSIS 3.1 cable modem services available for all multi-gigabit speed tiers, complete with fallback to 32x8 DOCSIS 3.0 (Approved by Comcast Xfinity for all speeds including Comcast Gigabit services.) Compatibility - Plugs easily into any WiFi router for shared internet access by all your WiFi and ethernet-capable devices. This cable modem does NOT have a built-in wireless router or telephone call capability. Flexible connection: A 2.5G Ethernet port to work with even the Fastest Routers and Personal Computers, providing downstream speeds just below 2,500 Mbps and upstream speeds up to 800 Mbps (when supported by your cable service speed.) Active Queue Management (AQM): Reduced Internet latency for faster page loading and better response time from your interactive applications like online gaming and video conferencing. Full-band Capture digital tuner enhances speed and saves energy. Cost-saving solution: Owning your own modem typically saves the average home $156 per year in monthly rental charges. (Savings are shown for Comcast Xfinity and vary by cable service provider.) This pre-owned or refurbished product has been professionally inspected and tested to work and look like new. How a product becomes part of Amazon Renewed, your destination for pre-owned, refurbished products: A customer buys a new product and returns it or trades it in for a newer or different model. That product is inspected and tested to work and look like new by Amazon-qualified suppliers. Then, the product is sold as an Amazon Renewed product on Amazon. If not satisfied with the purchase, renewed products are eligible for replacement or refund under the Amazon Renewed Guarantee.