The ARRIS Surfboard Docsis 3.0 Cable Modem and AC1600 Dual Band Wi-Fi Router is a high-speed internet device that offers a maximum downstream data rate of 343 Mbps and a maximum LAN data rate of 1000 Mbps. It has a white color and comes with ports such as Serial (RS-232), Ethernet (RJ-45), and USB 3.0. The device is compatible with PCs and television sets and features wireless connectivity with Wi-Fi 802.11a/b/g/n/ac and wired Ethernet (RJ-45). It also has beamforming, VPN capabilities, and dual-band features, making it ideal for gaming.

This was plugged in to make sure it powered up. It did pass that.  We have no way to test for internet.  It appears not to be used at all. Any questions feel free to ask.  Thank you.