The LED keychain is compact, durable, simple and stylish, also versatile, and easily Replaceable. It is powered by 3 original batteries. With a 0.2" diameter spotlight LED bead, the flashlight is perfect for bedroom, hallway, laundry room, stairwells, etc. Please note when you use it, take the little round insulator of the flashlight before use it. Made of high-quality aluminum alloy material with super bright high power LED, it makes the mini LED flashlight lightweight. The total length is only 3.9", so it has the advantages of small occupied space. It is really easy to carry around. Whether you're headed to a barbecue, going for a bike ride, or hanging out on the patio, the integrated loop lets you hook it, clip it, or grab it. It comes in handy, even in the face of emergencies.