USB Rechargeable LED Light Stick & large integrated USB power bank. Charge a smartphone 3 times over, or up to 72 hours of lighting on one charge. 3 levels dimmable brightness and white blinking mode for signaling. Shock-resistant, tested in 3 meter drop test and crush test. Hanging easily via lanyards or magnet mounting clips. Excellent for video and photography work, urban exploration, emergencies, camping, fishing, boating, hiking, outdoor activities and more. IP68 Waterproof to 6 feet and yes, they float!!