The Actijoy Health & Activity Tracker needs some power first. Use the Micro USB cable and charge it for at least 60 minutes. In the meantime, download the Actijoy App from either Google Play or Apple Store and make sure your Bluetooth is enabled. When your tracker is ready, it should automatically connect to your cellphone and you can start to follow the instructions in the App. As soon as the App is customized for your doggy, you can attach the tracker to the collar.
Here you can find the guideline: