Product No. 3959Life preserver signaling emergency strobeIntense strobe light visible up to 2 miles (3.2 km) Waterproof and corrosion resistant case Slim lightweight design Comes with an adjustable Velcro strap; can be mounted on bicycle frame or pole etc. Operates on 2 AA alkaline or 2 AA 1.5V lithium batteries (5-year replacement life when using lithium batteries; 1-year replacement life when using alkaline batteries) Operating life - More than 8 hours continuous @ -1C (30F)Size:6.0 x 1.6 in (15.3 x 4.0 cm)Weight:2.6 oz (74 g)Material:Rugged impact and temperature resistant ABSColor:International orangeOperation:Twist ON-OFF control can be operated by gloved hands and in adverse conditionsWaterproof:Up to 10 ft (3.1 m)Accessories:1083-Dated lithium/sulfide batteriesBeam Angle:Omni-directional 360 176;Visibility:High intensity strobe light is visible up to 2 miles (3.2km)Flash Rate:60 177; 10 flashes per minute nominalLamp:Xenon flash tubeBattery Type:2 AA alkaline or 1.5V lithium (not included)Certification:USCG 161.012/41/0 approved with 2 AA lithium or alkaline batteries; CELimited Warranty:1 yearCarton Dimensions:3959 - 13.5 x 13.5 x 9.0 in (34.0 x 34.0 x 23.0 cm)Operational Life:More than 8 hours continuous @ -1C (30F) Product : ACR C-STROBE LIFE JACKET EMERGENCY SIGNAL W/CLIP Manufacturer : ACR ELECTRONICS Manufacturer Part No : 3959 UPC : 791659039595