The 11-811 is GoodAll's most powerful Start-All! Jump start 24-volt heavy, transit or military equipment with 600 amps of cranking capacity, and any 12 volt vehicle with 1000 amps. A volt selector switch allows easy selection between 12 and 24-volt operation. The voltage is regulated to protect on-board electronics, and volt and amp meters allow monitoring of boosting output. Polarity and low battery LED indicators confirm proper connections, and GoodAll's Antizap® voltage surge protection provides safer boosting. The included 30-foot, 1/0 gauge welding cable allows convenient access to vehicles, and features 1000 amp full-power jaw clamps for higher amperage output. Requires a supply of 25 GPM @ 2500 psi with a minimum 3/4" pressure hose, a minimum 1" return hose , and a 5 micron filter for hydraulic power.