Upgraded curtain lights are powered by USB or batteryThe upgraded curtain light string is currently the only one on the market that has two safe power supply methods. Not only does it have an extra USB charging port, but it can also be powered by batteries. It runs via a USB adapter or power bank and also holds 3 AA batteries (not included).The curtain lights operate on a low voltage of 5V and will not overheat and will not pose any risk of electric shock or fire. Very sturdy and safe to touch.8 modes and timer functionsThe Christmas string chandelier includes 8 lighting modes: Combination, Wave, Sequence, Slow Glow, Chase/Flash, Slow Fade, Twinkle/Flash, and Steady On. When you press the "Timer" button on the remote control, the decorative lights will turn on for 6 hours and off for 18 hours.SpecificationColor: whitePower: 6WVoltage: 5V (USB powered)Dimensions: 9.8 ft x 9.8 ft with 300 LEDsPackage includes1 x 3m * 3m 300led curtain light string (with battery box, batteries not included)1 USB cable1 remote control10x hook