This pre-owned or refurbished cable Modem Docsis 3.1 has been professionally inspected and tested to work and look like new. How a product becomes part of Amazon Renewed when 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. If not satisfied with the purchase, renewed products are eligible for replacement or refund under the Amazon Renewed Guarantee. Modem router combo Xfinity compatible has 4 Giga Ethernet ports for wired connections. Active Queue Management (AQM) reduces lag for faster page loads and enhanced interactive applications. Backward compatible with 32x8 DOCSIS 3.0. Supports gigabit speed. Powerful 4x4 Wi-Fi 5 modem Docsis 3.1 Router - Power Boost, Range Boost, and AnyBeam Wi-Fi beamforming enable quality streaming, gaming, and connecting throughout the home. MU-MIMO seamlessly manages multiple device connections. Certified Motorola modem router for Comcast Xfinity, Cox, and Spectrum and compatible with IPv4 and IPv6