ABS material, ensures a long-time durability and water resistant. Collapsible design, you can easily store it in your cabin, backpack or survival kit. Charging method: Built-in 18650 battery, you can charge the lantern through the USB charging cable. It can also be powered by solar energy. Ideal for outdoor activities or using as an emergency light. 3 35/64" L x 3 5/32" W x 5 33/64" H