Stalker Sport 2 Radar - Starter Package. Free UPS Ground Shipping is back. Your order ships directly from the Stalker Radar factory. Choose the brand that all of the Major League teams use - Stalker Sport Radar. Direct from the manufacturer at the lowest available price. 300-Foot Range, farther than any competitor! Measures ball speeds from 5-150 mph. Accurate to +/- 1 mph. Captures release speed and plate speed simultaneously. Built by the industry leader - Stalker Radar.