🎈WARRANTY- 100 percent satisfaction: All Led light up balloons were carefully checked and packed nicely in colorful special designed boxes , If they do not meet your need, our customer service are hassle free for you to resolve your issue. If you are not satisfied with our balloons received, you can apply for unconditional return and reimbursement in the valid period. You can contact our customer-service staff at any time. We will be more than happy to solve your problem. 🎈Easy to Use---To activate the LED Bubble balloons and glow in the dark party, fill the balloons with air or helium and put 2 batteries in the battery box . Great for birthday, party, wedding, anniversary, pool party, dance club or any other special occasion worth celebrating. Why not include batteries?-- Because the 2AA battery makes the light even brighter.Because only need to replace the battery then the battery box can be used forever!. 🎈Magic Glowing Decoration---Our glowing balloons can be inflated for approximately up to 20 inches (Before Inflation, Only 7.8-8.3 Inches) and keep the air up to 7 days without leakage. The light string box comes with switch and you can turn the light off and on at any time. 🎈ENVIRONMENT-FRIENDLY MATERIAL: We made our Premium quality TPU LED Clear balloons thick enough to breakage resistance. Balloons inflate up to 20 inches. Use it for indoors or outdoors: The darker the area, the more brightness from the led balloon lights. 🎈INCLUDES EVERYTHING 15 clear balloons 🎈(Extra balloons can be used for DIY ), 10 10ft warm white string lights（ batteries not included ( will need 2AA )）, use some and save the rest for next time! You get a wonderful lighted experience that turns any gathering into a festival. These balloons can be filled with either helium or air. Simply use a helium tank or an electric air pump. Much easier than blowing up lesser party balloons.