They have an o-ring seal and the body of the light is a sealed single plastic housing. Please do notice that even though they are water resistant, they are NOT for continuous submersion. These Lights have an internal sensor that turns off the strobe during daylight and on in dark conditions. You can partially unscrew the lens when not in use or simply remove the batteries. Advanced Fresnel Lens Amplifies Light.They can be seen at an approximately 3/4 to 1 mile in favorable conditions. Wide Range Energy Conservative Circuit Allows Battery Life To Be Extended. With fresh batteries, these strobes can function for over a week of continuous use. Rinse and dry after use. Tighten the lens to prevent leakage, do not over tighten. Apply some Dow 4 grease to the contact to prevent corrosion. These strobes should have an extended lifetime with proper care. Pack of 8, RED then WHITE LED flashing. The item "Blinky Lights Marine 8 FISHING STROBES FOR LOBSTER CRAB HOOP NET RED&WHITE LED" is in sale since Tuesday, October 22, 2019. This item is in the category "Sporting Goods\Fishing\Fishing Equipment\Lights". The seller is "cordelac" and is located in Long Beach, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay, Russian federation.