SURFboard Wireless DOCSIS 3.0 Cable Modem and Wi-Fi Router SBG6900-AC RefurbishedThe 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. It's no wonder