We have upgraded the gearbox of this splatter ball gun to make it faster and smoother, bringing you a real experience. Gel water ball blaster is a safe way for outdoor shooting games. This is a continuous that can be installed with batteries, which can be used for a long time. It is very easy to assemble. This gun is powered by a 1200mAh battery. The battery is rechargeable. You can charge the battery with Included USB cable.(Please read the instruction carefully, and install the battery according to the installation method on the instruction). The gel water ball blaster is spring driven. You can enjoy it in the team game.Precautions for the use of gel balls This item uses a 7mm hydrogel ball As shown in the picture above, soak the gel ball for 4 hours until the diameter reaches 7MM before use If the weather is cold, you can soak in warm water Do not soak the gel ball in a water bomb bottle [find a large container for soaking] 1: The size of the gel bubbles in the water bomb bottle is different - the shooting will not be smooth 2: There will also be a lot of water, so when shooting - the gel balls will stick together causing them to get stuck This gel ball is safety for Kids,adults. And we also have a safety switch design and a gift of safety goggles to provide users with adequate protection measures.