From the data, Yellow has a full 4 USB ports, which are 3.0 ports. Blue has two 2.0 ports, while DSGW-HA-210 has only one 2.0 port. It is worth noting that since DSGW-210-HA Home Assistant gateway supports on-board custom addition of WiFi/Zigbee/Z-Wave modules, it does not require many USB expansion ports. 7.