Model 6127XL is an on-board starter battery with more cranking power than anyfast charger with up to 1100 Amps cranking power. This charger assists bothcustomers and employees where there is no electrical power along withrecharging batteries up to 20x faster than hand-carried units. Plugs into an ACoutlet for rapid automatic recharging. Solid state circuitry monitors thebattery condition and maintains max. state of charge. Includes a patented”Stop/Go light” on cable and 500 Amp insulated clamps with patented”Flexi-Spring” cable guards which warns the operator before making a reverseconnection. Designed for easy and quick handling, safety, and protection fromweather. Fully automatic, 10-amp charger recharges starter battery or anyon-board 12-volt battery. ***Battery NOT included*** Up to 1100 amps cranking power Recharges its internal battery up to 20X faster than hand-carried units Solid state circuitry monitors battery condition and maintains maximum state of charge Fully automatic 10 amp charger recharges starter battery or any on-board 12 volt battery Accommodates a group 31 Max user supplied battery (L 13″ x W 7″ x H 9.5″) Plugs into any AC outlet for rapid automatic recharging Designed for safe handling in any weather ON/OFF switch & clamp bar for safe storage of clamps when not in use 12 Volt DC Accessory Outlet to Power and/or Recharge DC Electronics MADE IN THE USA Warranty: 1 year bumper to bumper Battery not included, recommend minimum 500 CCA DC Charger Output: 10 amps AC input: 110 amps Cold Cranking Assist: up to 1100 amps Clamps: 500amp Flexi-Spring DC leads: 8ft. 4AWG AC cord: 6.5ft. 16/3AWG Shipping dimensions: (HxLxW)25″x11″x15″ Weight: 58 lbs.