Smart Bluetooth Control for Effortless Customization Probro Smart Bluetooth C9 Christmas Lights offer Bluetooth connectivity and app control. With 105 preset modes and customizable options, you can adjust brightness, colors, and sync with music, creating dynamic lighting for any occasion. Upgraded 24V Voltage for Enhanced Brightness: The 2025 upgrade to 24V voltage resolves previous brightness issues, ensuring bright, clear lighting for both festive decorations and everyday use. Perfect for outdoor areas like rooflines and gardens, offering reliable illumination. IP65 Waterproof for All Weather Durability: Built with IP65 waterproof materials, Probro C9 lights are designed to withstand rain, snow, and harsh weather. Perfect for rooflines, gardens, balconies, and more, ensuring your lights stay bright and stable in all conditions.