Goal Zero USB Lantern and Flashlight - Lighthouse mico-flash lantern and built in flashlight will provide you 170 hours runtime. USB rechargeable, dimmable lantern and waterproof. It's the perfect companion for the weight conscious adventurer. Waterproof USB Rechargeable: 3.5 hours to fully charge Built in 120 lumen flashlightDimmable 150 lumen lantern Weight 2.4ozDimensions: 3.66 x 1.5in 170 hour runtime on lowest setting