The dual function Hummer mini LED lantern & flashlight is the perfect size for your glove compartment, purse, or backpack. The Hummer mini LED is made of durable ABS and aluminum construction. The Nichia super bright white LED will last for over 100,000 hours and has polycarbonate focused lens. The unit takes 3 AAA batteries that are included and will run the flashlight or lantern for over 80 continuous hours. The flashlight/lantern has a simple twist to "ON" or "OFF". To use the lantern slide the head of the flashlight in the opposite direction while firmly holding the base in place. The lantern will stand on any flat surface. When changing the batteries you will need to line up the battery cartridge so it slides easily into the flashlight/lantern. The flashlight/ lantern measures in at 4.4 inches closed (5 inches open) with a 1 inch diameter.