Pokemon TCG: Sun & Moon 11 Unified Minds Elite Trainer Box - Rules of Play says:
To stay on top, your team must work as one! You can expand your team with the Pokémon TCG: Sun & Moon—Unified Minds Elite Trainer Box, which contains all sorts of useful items that a Pokémon TCG fan needs. Whether you're a collector or a competitive player, you'll certainly love the eight Sun & Moon—Unified Mindsbooster packs. And with 65 card sleeves featuring the iconic duo of Mewtwo and Mew, you can keep those cards looking pristine. With a selection of dice, acrylic condition markers, and 45 Energy cards, you'll have just what you need to get yourself into the game. Gain some extra knowledge about the game's mechanics with a player's guide filled with useful strategies and a handy card list. Of course, the box itself is extremely useful for storing all your goodies. Get your Pokémon united for battle with the Pokémon TCG: Sun & Moon—Unified Minds Elite Trainer Box!