Smaller than other approved lights, the HemiLight™3 features rounded edges to maintain the integrity of inflatable life jackets. Attachment loops accommodate webbing of up to 5 cm width. The marine tough design ensures years of useful service. The HemiLight™3 offers a basic strobe mode which can be activated either manually or automatically. The high intensity flashing LED light automatically activates for 20+ hr when it comes in contact with salt or fresh water, and can be deactivated simply by pushing the red button. Once the sensor is wet, and the light is on, the light will stay on even if the sensor is dry, unless manually deactivated.