USE OF BALLOON: PULL OUT THE PAPER SHEET， LIGHT WILL BE ON.To maximize the life of the balloon， we suggest you turn the balloon on for 2 or 3 hours or until it begins to fade a bit If you give it a rest for 10 to 30 minutes， the balloon will become brighter again. You can repeat this within the same night or ou can use again when you like. You should get at least 12 to 15 hours total use. The batteries can be replaced if done carefully. Open the inner cover to expose the battery pack of 2. Remove carefully noticing the contact points and how they work. You can now place 2 new tyep AG3 batteries in the same sapce.To dispose of any and all batteries， you should separate them from household trash and inquire as to your local "hazardous waste" disposal instructions. This is a Save the Planet request brought to ou by GDU.Product Size:12 inch.Color:Blue;Green;Yellow;Red;White Color. All color is Mix.We will ship random Color.Weight: 29g with packing.Package include: 30pcs Light balloon in a OPP bag.Note: don't offer color choice.Randomly send