Small, compact, rugged, waterproof; pack inside inflatable life jacket or attach to standard life vestPull-pin activation: Automatically lights when vest inflates or if manually pulledAdjustable flash shield for optimum eye protectionPull-pin lanyard clips to bottom of inflation chamberLight test feature with "Test Key" to ensure readiness-can be tested many timesEasy to mount-fits on inflation tube via "O" Ring which will not damage inflation tube, or fits on any strap of conventional life jacket"Tamper Tab" breaks to indicate light has been activatedLong term storage lithium battery-10 year storage life (recommended replacement 5 years from date of purchase-write month/year of replacement date on case at time of purchase)Operating life-approximately 8 hours continuous at -20C (-4F)Size: 3.1 L x 1.8 W x 1.6 D in (7.9 L x 4.6 W x 4.1 D cm)Weight: 2.8 oz (65 g)Material: UV stabilized composite polymerColor: Hi-Viz YellowOperation: Pull-pin activation; automatic on some vests, manual activation when pulled by handBeam Angle: 13 vertical; 2 horizontalVisibility: 15cd vertical; 2.5 cd horizontal; 2m (3.2 km)Lamp: Strobe lightBattery Type: Lithium; 10-year storage life (5 -year replacement life)Limited Warranty: 1 yearOperational Life: Approximately 8 hours continuous at -20C (-4F)