The lights are waterproof. Lids and handles are made of stainless steel. So you can leave them outside without worrying about the weather. Automatic sensor: simply unscrew the cover and turn on the switch, the lights charge during the day and turn on at dusk. Easy to use! Fast Charging: The solar garden lights will be fully charged in 5-8 hours under sunlight. When fully charged, they last 8-12 hours at night. They are like a bunch of fireflies in a bottle, each LED light gives off a beautiful warm glow, very warm and romantic. It’s also a perfect gift, everyone loves string lights. Note: Glass products are fragile. If they are broken when you receive them, please contact us in time and we will send you new ones for replacement.