The Crusher Portable Mini-Ball Pitching Machine from Heater Sports gives you the freedom and flexibility of 4 hours of rechargeable battery life as well as 110 AC outlet power. The bonus tubular steel, professional quality, tripod stand delivers each pitch from a realistic pitch height. The Dual Speed Controls give you the ability to hit fast balls and curve balls from 15 to 45 MPH with the simple turn of the knobs.