1. High brightness, warm and not dazzling, cold light source, can be lit for a long time2. Convenient to carry, easy to use, suitable for a variety of scenarios3. Occasions: cafes, hotels, shops, department stores, streets, house eaves4. Light string waterproof design, safe for daily use5. Power supply:- Battery type: 2 x AA batteries for 10LED, 3 x AA batteries for 20 LED / 40 LED (batteries are not included)- USB type: can be connected to any USB interface for power supply6. Mode: 10 lights are always on, 20/40 lights are always on + flashing7. Shell material: plastic

http://olla.gr/christmas-elk-string-lights-holiday-decoration-spec-1.5m-10-leds-battery-box-colorful-light/