Features: Party Decor Must-Have - 1.8cm Diameter. These mini led lights are easy to hide perfect for paper lantern balloons or party décor birthday wedding décor and etc. Long Lasting - Enough for light up 100pcs balloon. Bright and energy-saving can last more than 48 hours. (Batteries included) Waterproof - Can be usd in water drinking wine vase suit for indoor/outdoor use. Widely Use - Limitless uses of these lights let your thoughts go wild!! Add a wow factor to any Wedding Engagement party Disco Camping Barbeque and any other use that you can use your imagination for! Easy to Use - Just pull out the Insulation tab and light up your night in second. (COOL WHITE lights are steady on without flashing). TIPS: If the lights didn t light up or weak light please press the led slightly and they will ALL be bright