This set contains two Gama Sonic DL-972LS rechargeable, portable lanterns and two AC adapters. The DL-792LS is a versatile household utility light that can function as a work light, a camping lantern, an emergency light, or a very bright flashlight. The unit has two modes. Set the DL-972LS to 24-LED mode for use as a lantern or work light for up to six-hours on a full charge of its internal lead-acid battery. Or set it to single high-beam mode for use as a very bright LED flashlight for up to 35 hours on a full charge of the battery. The DL-972LS also has a backup compartment for three standard AA batteries so that you can keep using the light in situations when you aren't able to recharge the internal battery. To charge the four-volt lead-acid battery, just plug in the DL-972LS with the included UL-rated, five-watt AC adapter and leave it until you need it. You can rest easy that leaving the AC adapter plugged in won't run up your energy bill or fry the battery--built-in overcharge protection stops current from flowing to the battery once it's fully charged. As an extra benefit for household safety, when the DL-972LS is plugged in, the will light turn on automatically in the event of power loss. For worldwide travelers, the adapter can handle up to 230-volt input, meaning you can take the light with you on trips outside the US (though you'll need a prong converter for the adapter to fit non-U.S. electrical outlets). The Gama Sonic DL-972LS is far brighter than a standard flashlight but still has a convenient carrying handle for easy portability and a manual on/off switch so that you can use the light as needed. With two DL-972LS units in this set, you're double covered for camping trips, nighttime walks, looking around a dark shed or basement, mechanic work, emergencies, or any other time when you need extra light.