NOTE: Once stick it to ONE PLACE; youd better not remove 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. NOTE: 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 battery,then close it. Stick and click, quick and easy light anywhere;With self-adhesive sticker on the backside, can easily be sticked to wood, plastic, metal, glass, etc No wiring required.Turn on/off light by pressing the top of the light;3 LED inside, super bright white light. 3 AAA Batteries required. Delivery Quantity: 10pcs Package Contents: Only the above package contents, excluding other products. Batteries are not provided. Size: 6.5*6.5*2cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color: White (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)