UST Marine PFD Signal Kit 1.0 Pfd signal kit Essential kit High-pitched rescue Contains marine survival essentials including See-Me 1.0 LED Steady on light, Hear-Me marine pealess whistle and Find-Me signal mirror Easy twist on and off Unbreakable lifetime LED bulb never needs replacing LED light emits 20 lumens, 360 degree light visible up to 3.4 miles Impact-resistant and waterproof (IPX7 rating) Runs for 17 continuous hours on one set of 2 AAA batteries