Package includes:1 LED light (3 AAA batteries not included).Diameter: 6.8cmThickness: 2.5cmPower: 3Pcs AAA batteries (battery was not included)Color:silver1. Children can be used as flashlights or emergency lights when they get up at night;2. This product can be carried when traveling abroad, which is convenient and practical, and can be installed on tents, bicycles, or other attached objects;3. Can be used as a decorative lamp for dressing table;The back adopts self-adhesive stickers, which can be glued to planes such as wood, plastic, metal, glass, etc.Bring you convenient lighting everywhere, indoor and outdoor, can be used anywhereOutings, picnics, tent lighting, all at your fingertipsCar interiors, trunks, doors, roofs, adding color to the interior, home cupboards, bars, children's backpacks, bicycles, and more Anytime, anywhere, no cables requiredThis light can be used as a lighting light for up and down stairs at night, and can also be used as an emergency light.Easy installation:Step 1: Peel the dual adhesive tape of the bottom.Step 2: Mount the lights onto almost any surface.Step 3: Tap the light to switch it on and off.Step 4: Switch close to open button and install 3 AAA batteries (not included).Warming Tips:1. Once stick it to one place; you'd better not remove it to another place.Otherwise it will lose the stickiness and break off the plastic cover, the proper use of 3AAA alkaline batteries can guarantee that light will last for a long time and prolong the lifetime of the batteries.2. When you change the battery, do not pull the plastic directly.Otherwise the plastic that holds the light in part will break off.You should hold the plastic part and rotate it in a clockwise direction, then open it and install the battery, then close it.3. Before stick it, clear up the dusty and mess, keeping it more sticky on the surface.