Allstart 5510 Intelli-Clamp Works with any EC5 connector found on almost all lithium jump starters. 8000mAh to 12000mAh Cross Polarity Protection - If the user hooks them up backwards, you have no spark. Red LED on clamp will et you know they are still not active Short Circuit Protection - If the vehicle has a short in the battery circuit, the clamps will automatically shut down Real Time Average - The Clamps recognize cranking amps in real time, cranking time is set accordingly to protect the unit and vehicle Auto-Shutoff - Once the vehicle is started, the clamps will automatically shut down