Metal Strobe Flash Mini LED Light with Heavy Duty Secure Carabiner Clip-On Keychain Zipper Pull for Tents, Backpacks, Totes, Purses, Hiking, Camping Jackets, Dog Collars, Running, Walking, Sports. - Type: Metal Strobe Flash Mini LED Light - Material: Metal - Use: Pet Accessories - Color: Silver - Features: Swivel Hook Includes Batteries Extremely bright, small, discreet, and lightweight all-metal mini LED light. With a very secure swivel metal carabiner clip. The long-lasting mini LED light is alternating colors of red, white, and blue fast strobe/flashing. Waterproof. Twist the cap to turn the strobe light on and off. Great for tent zippers, backpacks, jogging, hiking, kayaking, cycling, kids, safety lights, and more. The total length of the LED light and carabiner clip is approximately 2.25 inches long. The barrel housing is approximately 3/8 inches in diameter. Requires 3 LR41 batteries, batteries are included, batteries can be replaced by unscrewing the case. Thank you for looking.