Experience head-to-head competition with the precision and power of the Nerf Rival blasters! Use this rechargeable battery pack with Nerf Rival Khaos MXVI-4000 blaster (sold separately) instead of batteries to increase the blaster's rate of fire. With this rechargeable pack, there's no need to stock up on batteries – just recharge and get back into battle! Includes wall charger. Nerf and all related properties are trademarks of Hasbro.