This article will guide you how to setup speed control and the steps as below.
Model Number：Tenda AC18 Question Classification：Function Settings
Step 1：Open a browser then type http://tendawifi.com in the Address Bar, press Enter. Type in login password, and click “Login”.
Step 2：Click “Advanced Settings” and choose “Bandwidth Control”:
Step 3：Choose the device you want to control, and then set the speed of upload limit and download limit: