There is no need for electricity, batteries, or external power. Turn on the water source and the light can be turned on! Colorful self changing color: multi color free transformation! Very beautiful! Colorful lights change color circularly, fashionable and practical. Independently researched and developed, it plays a role in pleasing mood, relieving stress and eliminating fatigue by relying on color change. You can give gifts for your own use![LED luminous color] temperature sensitive color change / temperature control tricolor[interface size] 20mm internal thread (universal interface)[product size] length 150mm width 150mm thickness 15mm[number of LEDs] 8-12pcs (the number of lamps can be customized as required)[packaging method] color box packaging[material] ABS engineering plastic[surface treatment] electroplating