Spiral Gold Recovery System Includes: built-in 12-volt battery, built-in 110 volt charger. Includes Hand Crank System so the machine works in manual or battery mode, takes less than a minute to set up. Can process 140 lbs of material every 60 minutes. No need to screen the material first this machine will do the screening for you. Takes material up to 2 inches. Works wet or dry. In dry operation you will highly concentrate the material. It will take 140 lbs of material down to approximately 2 cups of concentrates in 60 minutes. Wet it will work the material down to clean good. Shipping weight 15 pounds.