FEATURES: Powered by spring tension - no electric power or batteries required THROWS baseballs up to 50mph and softballs up to 45mph. EASILY ADJUSTABLE to change pitch location and speed. VERSATILE DESIGN throws most types of balls including baseballs, softballs, restricted flight balls, plastic balls, dimple balls, IRV balls and soft core T-balls. HELPS IMPROVE hitting accuracy with throwing pitches or long and high fly balls. ADDITIONAL DETAILS: Manual (PDF)