8 light up Balloons in 1 pack with 5 mixed colors – very durable latex material and don’t pop easily in the grass or elsewhere, LEDs are blinking; changing colors and lasts 24 hours+, therefore can be used as party lights. The LED lights are not fastened on the inside of the balloons., Use it for indoors or outdoors – they’re fillable with air, helium (fill about 20% helium and the rest with air), The ultimate party supply for younger kids or older children’s birthday parties, The perfect decorating lights for any party i.e. office, anniversary, costume, retirement, etc. We understand that LED lights are not always reliable, therefore for our valued customers, should you encounter problems, know that we will help. Contact us if you notice any problem. We’ll assist you as soon as possible.