It is in excellent working condition and I am currently using it so can show the speed via a wireless connection to test if needed
Motorola MT7711
24X8 Cable Modem/Router with Two Phone Ports,
DOCSIS 3.0 Modem, and
AC1900 Dual Band WiFi Gigabit Router,
for Comcast XFINITY Internet and Voice
This exact modem at amazon - https://www.amazon.com/MOTOROLA-MT7711-Gigabit-Comcast-Internet/dp/B07GX2ZQXG?th=1
download speed - direct connection to the ethernet port 800MBps
uploade speed - 100MBps
+ a free panasonic cordless phone (2) as seen here