The Pokémon GO Plus is a small device that lets you enjoy Pokémon GO while you're on the move and not looking at your smartphone. The device connects to a smartphone via Bluetooth low energy and notifies you about events in the game—such as the appearance of a Pokémon nearby—using an LED and vibration.
PokéStop Alerts
The Pokémon GO Plus will begin to blink and vibrate whenever you're within range of a PokéStop. Press the Pokémon GO Plus button to search the PokéStop for items. If you find any items, they'll immediately be added to your inventory.