Check the listing for details. Planet Eclipse Protoyz Speedster Electronic Paintball Loader Hopper BLACK. Color: Black, Condition: New. Listed at 49.95 USD. Its internal features continue the tool-less construction ethos; the entire assembly can be removed easily and the four 1.5v AA batteries can be quickly inserted or replaced.Controlling the paint feed is the Speedster’s encapsulated light barrier unit, which is protected from moisture and dirt. With the help of the light barrier, the electronics know when the marker is fired, and only feed paintballs when necessary. This operating principle is supremely energy efficient providing feed rates of over 10bps.The Speedster Loader can also be converted from .68 Cal to .50 Cal with ease. Simply plug the .50 Cal insert (provided with the Speedster) into the light barrier unit and you're ready to use .50 Cal paintballs.Features:Convertible from .68 to .50 Cal50 Cal insert includedTough (Glass Reinforced Nylon) GRN constructionTool-less assemblyLight barrier-supported feeding technologyVery low power consumptionEasy to cleanLarge agitator paddle system10bps+ feed rateAnti-tamper on/off button for field useTechnical data: Capacity: 210 Rounds (68cal) 500 (50cal)Caliber: 68cal / 50cal (50cal adaptor included)Power Source: 4x AA 1.5v batteries (not included)Length: 23.9 cm / 9.41"Width: 11.30 cm / 4.45"Height: 12.7 cm / 5"Weight: 559 grams / 19.71 oz (without batteries)