Feature: The total length is only 10.5cm/4". So It Has the Advantages of Small Occupied Space. Really Easy to Carry Around. Bright LED adopted. Its brightness is 10 lumens which can be used as a practical flashlight, perfect for bedroom, hallway, laundry room, stairwells, etc. Made of High-Quality Aluminum Alloy Material With Super Bright High Power LED, it makes the mini LED flashlight lighttweight. POWERED BY Watch Batteries LR41 x 4 included Compact, Durable, and Versatile, Easily Replaceable. Please note when you use it, take the little round insulator of the flashlight before use it. Specification: Main Material: Aluminum Alloy Type: Battery Power Color: Black ,White Lumen: 10 LM Power Supply: LR41 x 4 Battery Size: One Size 10.5 x1.5 cm(4 x0.6 in) Quantity: 1 Pc Note: 1.1cm = 0.39inch. 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Flashlight Keychain