Model: H70C4(66ft) & H70C5(99ft) & H70C7(164ft) Recommended: 66 ft of string lights for a 6 ft (1.8 m) Christmas tree, 99 ft for a 7.5-ft (2.3 m) tree, and 164 ft for a 9-ft (2.7 m) tree. Transform your space with Govee's RGBWIC Lighting Effects, powered by Uni-IC Control technology, offering 16 million colors for mesmerizing Christmas tree displays. With over 130 preset animated scenes, easily switch colors and patterns for any occasion. RGBWIC Lighting Effects with Govee Uni-IC Control Technology: Govee Uni-IC Control technology allows each LED bead to choose from 16 million colors, decorating your Christmas tree with flowing RGBWIC effects. 130+ Preset Animated Scenes: Choose from over 130 lighting effects, allowing you to switch colors and patterns to suit any occasion. Create your magical space with programmable string lights. Shape Mapping Technology: Accurately identifies the position of each lamp bead in your outdoor Christmas String Lights, creating vivid DIY lighting effects. DIY with AI Lighting Bot: Create custom lighting effects in seconds using voice, text, or image prompts. Easily edit and refine your designs to bring your imagination to life. Year-Round Outdoor Reliability: Reliable waterproof rating, designed to work even in bad weather (-20°C to 40°C). Features an upgraded green wire, which enhances the durability and stretch resistance. (Note: The adapter cannot be immersed in water). Smart Control: Govee's Outdoor Christmas String Lights are compatible with Alexa, Google Home, and Matter for easy control.