The speed you need: where you need it. The SURFboard SBG6900-AC is 3 products in 1: a DOCSIS 3.0 Cable Modem: Dual-Band Concurrent 802.11ac Wi-Fi Access Point and 4-Port Gigabit Ethernet Router. With download speeds up to 686 Mbps and Wi-Fi speeds up to 1900 Mbps it?s the most powerful Wi-Fi Modem in the SURFboard lineup. No more buffering while streaming HD video. No lag while gaming with friends. And best of all: no more dead spots! And: with over 135 million sold: it?s no wonder we are the market leader in modems.