Launch Dreo and sign in or create an account by following in-app instructions. 2. Enable Bluetooth on your mobile device and plug in your air conditioner. 3. Hold the Timer button. (Tip: The WiFi icon for 5 seconds to start WiFi connection settings. will keep flashing while pairing.) 4. Tap +Add Device and select AC515S/AC516S. 5. Follow in-app instructions to complete the WiFi connection. 6. You're now ready to control the appliance on your app.