Nintendo Pokémon GO Plus +

The packaging is Japanese, but item works the same as the US version.
Catch Pokémon and track your rest rhythm with the Pokémon GO Plus + accessory!
Keep track of your sleep with the press of a button
Press and hold the central button on the Pokémon GO Plus + accessory and place it by your pillow to track your rest rhythm on the Pokémon Sleep app
There’s a Pikachu within your Pokémon GO Plus + that can sing you lullabies and act as your morning alarm; Pikachu grows friendlier the more you sleep, unlocking even more sounds!
Spin PokéStops or throw Poké Balls automatically in Pokémon GO for hands-free gameplay (and Great Balls and Ultra Balls can be thrown too!)