Ultimate Survival Technologies Jolt USB Rechargeable Mini Light Ultra-compact flashlight with handy clip for attaching to key rings, backpacks, belt loops, and more Runs for up to 2 continuous hours; rechargeable lithium battery (included) charges in just 20 minutes via any USB port Constructed of durable ABS plastic with rubberized, soft-grip; bright, clean light with up to 25 lumens Water-resistant IPX4 (protected against splashes from directions) Measures 2 x 0.7 inches (51 x 18 mm) and weighs 0.6 ounces (17 grams)