Bullet Points: 1Increased Safety: Device can easily be seen for over a mile at night in the water from any type of watercraft. Perfect for fishing, kayaking, rafting, water skiing, tubing, and more! 2Easy To Use: Attaches to any life vest with included lanyard and clip. 3Water Activated: LED strobe light automatically turns on once the device is exposed to water. 4Keep Afloat: The LED light can float in the ocean, so that it can ensure the constant visibility for people. 5Without Batteries: Note: The product itself does not contain batteries. Feature: Suitable for maritime display position The lamp flashes when it touches the sea water. Name: Dry battery water position indicator light Model: PH2701A LED: 3.0-3.4V Adapt to ambient temperature: -30-+65 Luminous intensity: >0.75cd Adapt to water temperature: -1-+30 Working time: >8h Light-emitting type: flash Working voltage: 6V Flash frequency: 50~70 times/minute Battery capacity: 1.28Ah Light color: white Dimensions: 13042mm Weight with battery: no more than 156 grams Battery used: AA alkaline battery, 4 series in series, each 1.5V Package: 2PC Position Indicator Light