1.Please make sure the 2 sealing rings are in the correct position, especially, to keep the inner sealing rings in grooves
2.Please screw up tightly before put it into water, then the 2 sealing rings would will work collaboratively, that will not let water in,
3.Please dry inside and outside of the light, in particular, the thread and groove before you use it or store it.
4.After you take out of the lights from water, even though it seems that there is no water inside the light, because it is possible there is water vapor inside which also will damage the component in some time, please try to dry inside of the light, in particular the thread and groove where the water hide before changing batteries, It is very important!!!
Battery Function Tips:
1.When the lights stay on red color, means low power, it will need change a battery.
2.Get the batteries out of the light if our do not use it. Since there is still standby consumption power inside.