describe Safety Certification: The low-voltage transformer and the string light set (including the string light, LED bulbs and sockets) have been certified to ensure and maximize safety, high-quality LED bulbs and copper wires can be used safely in daily life. PERFECT SIZE & SUPPORT 3 GROUPS OF END-TO-END CONNECTION: 300 LEDs 33m, supports up to 3 groups of end-to-end connection. 1-3 sets can be freely connected according to needs. You can buy 3 sets connected together, enough to cover a larger area. 8 lighting modes: Combo, Wave, Sequential, Slow, Chase/Flash, Slow Fade, Twinkle/Flash and Steady, these 8 lighting modes are suitable for this Christmas LED string lights. Strong rainproof, strong snowproof IP44. It can withstand all kinds of wet weather, such as heavy rain and snow, and is designed for indoor and outdoor use. Gardens, courtyards, lawns, fences, porches, trees, roofs, decks, outdoor patios. The perfect Christmas string lights. decorate. Perfect lighting creates a