Size 4.25” (12cm) diameter x 1.25” (3.5cm) tall Weight Less than 7 oz. (200g) with battery Battery 1 CR-123 Lithium battery Shelf-Life 10 years Buoyancy Positive (floats) External Power Non-rechargeable CR-123 Battery Op. & StorageTemps Fahrenheit: -40/-40 to 212/248 deg FCelsius: -40/-40 to 100/110 deg C EmissionSource 360 degree LED array: solid-state; no filament Flash Patterns (User-Selectable)Max. Run Times,Continuous Flash Pattern PF -200Solid-On High: 8 hoursRotate: 15 hoursAlternate: 10 hoursQuad-Blink: 15 hoursDouble-Blink: 30 hoursFast-Blink: 12 hoursSlow-Blink: 100 hoursSolid-On Low: 60 hoursS-O-S: 24 hoursFlashlight: 15 hours Approvals & Certifications: Complies with U.S. DOT (FMCSA) 49 CFR §§392.25 & 393.95(g).*MUTCD Type A (flashing) and Type C (solid on).Designed to meet MIL-SPEC/MIL-STD 810 forshock, vibration, and water-resistance.