"Built-in light sensor, the light will automatically turn on in the dark and automatically turn off during the day. The memory chip will remember the last mode setting, so you don't need to reset the mode every day.4. The crystal ball size (1 inch in diameter) and 24 feet long. Outdoor light strings can be used extensively for Christmas, Valentine's Day, weddings, parties and other celebration occasions. Specification:Light Color: Multi ColorProduct size: 10mPacking size: 140*90*70mm/5.51*3.54*2.76""Net weight: 300gGross weight: 320gMaterial: ABS+PCBattery: Built-in 600mAh NiMH batteryLumens: 100LMCharging time: 6 hoursWorking time: 8-10 hours, total working time over 10,000 hoursNumber of LEDs: 50LEDBattery: 1.2V 600mASolar panel: 2V 100mALife time: 5000 hoursWorking temperature: -20-60 °CWaterproof rating: IP65 Function description: light control, always bright when there is no light Notes: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools.2. The picture may not show the actual color of the item because of different photographing light, angle and display monitor."