First, enable Bluetooth on the selected mobile device. On the iOS device go to Settings > Bluetooth > and tap the slider to turn Bluetooth ON.
Now, go to the Eko App (downloaded from the App Store) and your CORE should be ready to pair. Turn on the CORE and the white LED light will start flashing. Press Connect Device and if the Bluetooth connection is successful, the LED will turn from flashing white to solid white.
If Bluetooth pairing is unsuccessful, an error message will appear in the App and no sounds will be recorded.