This appears to be a Water Bomb Gun (also known as a gel blaster or Orbeez gun), a popular battery-operated toy designed for outdoor play.

Key Features and Specifications

Ammo Type: It uses 7-8mm crystal bombs (gel balls/water beads) that must be soaked in water until they swell to the correct size.

Operation: Most models are electric and rechargeable, typically including a USB charging cable and a rechargeable battery.

Performance: These blasters can often fire up to 300 gel balls per minute with a significant shooting range.

Age Recommendation: The packaging indicates it is intended for ages 14+.