DOCSIS 3.1 cable modem approve for gigabit speed cable internet plans. Certified to work with Xfinity Internet & Voice service. 32 downstream x 8 upstream DOCSIS 3.0 bonded channels. Plus, 2 downstream x 2 upstream OFDM channels. Two telephony ports for digital voice service. Compatible with any Wi-Fi router.• ARRIS T25 SURFboard DOCSIS 3.1 Internet & Voice Modem for Xfinity Black• Internet service provider: Xfinity• Connectivity Technology: Ethernet• Compatible Device: iphone, Fire Stick, Streaming Devices, IOT Devices, Personal Computer, Tablet, Cell Phone• Weight: 2.4 lbsThis item has FREE SHIPPING!We accept paypal, and payment upon pickup!If there are any problems with your purchase, please give us the chance to correct the problem prior to leaving response. Please contact me for shipping to Hawaii, Alaska, or Puerto Rico. NO international shippingIf there are any problems with your purchase, please give us the chance to correct the problem prior to leaving response. Please contact me for shipping to Hawaii, Alaska, or Puerto Rico. NO international shippingItem is brand new but does have some box damage from shipping in a pallet with other items. This does not affect the inside contents, but if you are looking for a perfect box this isn't it because it does have some flaws. I tried to picture some of the best I could. But all the insides are still in perfect condition!