The weatherproof external mode X7 E-Grip helps you shoot up to 20 balls-per-second and features five different firing modes including semi auto, turbo, 3-shot safety burst, auto response and full safety auto. Firing modes can be changed during play. An internal mode system can also be set to semi-auto so that the E-Grip meets regulations of any organized field event. Requires a 9-volt battery (not included).