If you just bought a Pokémon GO Plus this may help you.
Pokémon GO Plus uses Bluetooth, wich means you need to have Bluetooth on your device.
To activate your Pokémon GO Plus, go onto PoGo and bring up the Menu, then press settings, then press “Pokémon GO Plus”. Now press the button on your Pokémon GO Plus, then it will show up. Now press it and it will connect.
To save battery, your Pokémon GO Plus will turn off around every hour. Then you don’t need to go back into the menu. You can just click the Pokémon GO Plus icon in the top left and it will tell you to click the button on your plus.
The Pokémon GO Plus device does not tolerate alot of water.
Thank you for reading and please tell me if this helped you!