Could be 2.4GHz and 5GHz channels, what is the make and model of your modem/router? That covers the two networks side of things.
#As for the speed, do you happen to have BT as your ISP (internet provider). If so, visit this forum in the Browser or Chrome app on your DroidBOX. You'll see a BT logo instead. Click GET STARTED button, then NO to Parental Controls. You're then done, no need to login on the next page. If that isn't clear, please check
https://droidbox.co.uk/how-to/bt-are-your-isp-add-on-problems/