The power supply of the light string includes battery and USB connections, which allow the light string to adapt flexibly to different power requirements and eliminate power constraints. The light string has three options for length and number of lights, namely 3m with 20 lights, 6m with 40 lights and 10m with 80 lights. It also offers six distinctive styles with various shapes to meet individual decorating preferences. In addition, the light string uses a lightweight and durable plastic housing and operates with a 220V input voltage, which provides stable power, ensures long-lasting brightness and enables compatibility with standard indoor power supplies. Leaper Christmas LED Decorative Light String - Style 4 Size: 6m