On Wednesday, August 9th, 2017, the Pokémon GO Plus Deluxe Set (Pokémon GO Plus デラックスセット) will be available to purchase at the Pokémon Centers and Pokémon Stores. The pack includes a Pokémon GO Plus which allows you to play Pokémon GO without having to keep watching the screen of your smartphone. The set also includes the Pokémon GO Plus Exclusive Optional Ring which allows you to easily operate the "Pokémon GO Plus" in the palm of your hand. The set also includes a Monster Ball shaped mobile battery that can charge a cell phone up to 4 times allowing players to play "Pokémon GO" comfortably on the go.

Pokémon GO Plus Deluxe Set Includes:

• Pokémon GO Plus
• Pokémon GO Plus Exclusive Ring
• Pokémon GO Plus Customizable Stickers
• Monster Ball Plus Driver
• Monster Ball Mobile Battery Anker 10000 mAh
• Coin Type Battery CR 2032

Source: http://www.pokemon.co.jp/info/2017/08/170804_p01.html