• Octopus Electronic Flare Blue• Emergency Warning Light with magnetic base can be seen for 1/2 mile• Rechargeable LI-ON battery keeps its last charge for two years• Waterproof to 30 feet below surface. Nine flashing/non flashing patterns.• Crushproof• Used by Police and Fire Departments• Single 16 LED Octopus light includes 12v and 120v charge kits• Great for emergencies, power outages or recreational use.