Specially makes the silica gel seal packing collar, protection rank IP68, the electric appliance three levels of insulations, the security DC voltage power supply, the ultra low power , does not have the temperature, - ℃ 40- ℃ 80 normal works. The average useful life 80,000 -10 ten thousand hours, safe, durable, are reliable. A lamp multicolor, procedure control, but is static may move. Its energy conservation, the long life, the color bright (by), the security, the maintenance are invariably simple and so on the characteristic, widely uses in submarine, the water surface, decoration embellishment and so on .