【Safety】Smoke-Free, NO flame, NO heat, real safety and environmental protection | 【Operation】A rotary SWITCH is in the bottom. Tighten to TURN ON the light, loosen to TURN OFF | 【Powered】Each LED Waterproof Candle comes with one CR2032 button battery, the battery can be REPLACED easily when it is drained which will last for 30 HOURS. Easy to create a comfortable and romance ambiance | 【Convenience】Can be PLACED in fish tanks, vases and other water containers lit! INDOOR or OUTDOOR, can be anywhere you want! Replace the traditional candles, become a new environmental protection product | 【Application】Suitable for party, wedding, bar, table, hotel, home DECORATION, church, temple, concert, HOLIDAY activities, promotional GIFTS, outdoor activities and other places, absolutely safe to make the scene full of warm and romantic atmosphere