Pokémon GO Plus

Pokémon GO Plus is a companion device that connects to your phone over Bluetooth.

Use
The button will turn blue if you pass a PokStop, green if you encounter a Pokmon you have encountered before, and yellow if you encounter a new Pokmon. Pressing the button on the Pokmon GO Plus will swipe the PokStop or use a Pok Ball to catch a Pokmon. If the Pokmon escapes from the first Pok Ball thrown, it will run away, and the Pokmon GO Plus will flash red.