The game tracks the amount of time a user sleeps, using the accelerometer of the external Pokémon GO Plus+ accessory, and communicates the data to the user's mobile device via Bluetooth for sleep-related game play. Though not much is known about the exact game play yet, The Pokémon Company has promised it will turn "sleeping into entertainment" in a similar way to how the Pokémon franchise's other mobile game, Pokémon Go, turned the act of walking into entertainment.[5][6]