The Cat 1000 watt Professional Power Inverter delivers up to 1000 watts of continuous power when connected directly to a 12V battery and 100 watts of continuous power when connected to a vehicle's 12 Volt DC accessory outlet. The inverter features two 120V AC household outlets and two USB ports provide up to 5V 2 amps to charge smartphones, tablets and more. The unit has a lit panel to indicate to the user how it is connected and how much power is available. Built in Battery Protection: Low battery warning and shut off prevents complete battery discharge Short Circuit Protection ETL Listed for Safety