HQRP 20-Pack Swimming Pool Party Dual LED Light/Multicolor Underwater Submersible Candles for Light Show UV Meter HQRP&reg; 10 Submersible Multi-Color LED Light Candles + HQRP&reg; UV Chain / UV Health Meter; Super Bright 2 LED, Reusable, Waterproof, Wireless, Flameless, Heatless; Color automatically changes every second. Replaceable 2 x CR2032 Batteries are installed; Height: 1 inches; Diameter: 1.125 inches. 30 Days Warranty