Reload and continue the fun with these Gel Beads for RoboMaster S1 from DJI. This ammunition is specifically designed to work with the RoboMaster S1. The customized gel beads have a custom color that allows for added trajectory effects after they are fired. They are mainly composed of sodium polyacrylate crosslinking copolymers, and is both safe and non-toxic. After soaking these beads in clean water for 3 to 4 hours, you'll be ready to go. The two included bottles provide approximately 20,000 gel beads.