Designed and built with military-style hard anodized water pressure resistant construction, it uses a totally sealed magnetic controlled side switch. Max output is a powerful 700 lumens with over 18 hours of run-time at the low power level .Three levels of brightness are available (65, 270 and 700 lumens), plus emergency strobe. Powered by one # 18650 Rechargeable lithium battery (supplied at no additional cost - a $14.80 Value).
Invaluable for water travel and all boating activities - in fact for any circumstance where you want to be absolutely sure that your flashlight will never be affected by water. Highly recommended as best in class.