The result of an unholy union between the old Knog Frog and a Massachusetts lighhouse, the new Frog Strobe puts out a stunning 25 lumens of light.A water-resistant, flexible silicon body with integrated clip fits around any shape; 19-32mm in diameterSingle high powered LED strobe system with lens puts out 25 lumensVisible up to 600 meters50 hours of burn time steady, 80 hours flashingUses 2 CR2032 batteries, includedFour modes; constant on, strobe, disco inferno strobe (fast), epeleptic fit strobe (random)Hold down button to turn off in any modeA scant 19 grams with batteriesItem SpecificationsWeight19gBattery2x CR2032Bulb1 White LEDRun Time50 hrs constant, 80 flashing