Once you pair your mobile device via Bluetooth with the TWS1, open the Atlantic Technology TWS app on your phone and select the earbuds you're currently paired with. On the top right corner of the screen, you should see a 'Settings'  icon; click on it and you'll see the next screen.  In the settings screen, you'll see the right and left earbuds, and each should correspond with 1 tap, 2 taps, and a 2-second hold command. To the right of it, there's a drop-down menu you can open and select from the list of functions you'd like to have for each command.