Features: 1. The lamp shell is fabricated from clean plastic, and might be uncovered normally within three hundred meters of water depth. 2. Three water-resistant ring, make sure no leakage. 3. The wick part is product of double sided epoxy board. 4. The circuit part provides a boost circuit to guarantee enough voltage. 5. In order to make the lamp skip variety of colors, and expand the flashing mushy IC. 6. You can also use microcontroller programming, to fulfill different standards of customers.