The ACR Auto HemiLight™3 flashing survival light attaches to almost any style life jacket with a quick and easy installation. Smaller than other approved lights, the HemiLight™ɜ features rounded edges to maintain the integrity of inflatable life jackets and meets USCG, MED and SOLAS requirements. The high-intensity flashing LED light automatically activates for 20+ hours when it comes in contact with salt or fresh water, and can be deactivated simply by pushing the red button.