1. Solar powered, long working hours: Let the solar panel face the sun directly during the day, and the light will shine for many hours at night. 2. Christmas garden party decorative lights: Hang them on trees, vines, porches, room windows, balconies, and walls to bring a warm and pleasant ambiance to your home, garden, patio, lawn, gazebo, landscape, wedding, or party. 3.2 ON/OFF buttons: One for turning on/off, and the other for 8 light effect modes (steady, flashing, flashing, gradual fading...). 4. Waterproof LED solar string lights: 21ft 30 LED crystal balls can withstand all kinds of weather conditions, including heavy rain and snow, suitable for indoor and outdoor decoration. 5. A good gift: You can also give this beautiful string lights to your family/friends/colleagues, etc.