Securitylng SF55 2400 Lumens 4x XM-L T6 LED Waterproof FlashlightBattery not Included) Super Bright: Adopting 4X Cree XM-L T6 led chip, the output brightness up to2400Lm. Perfect item for home using or outdoor sports, such as camping, fishing, night walking and daily home facility maintenance. 3 Modes Options: High / Low / Strobe (Long press the button for at least 3 seconds). One button operation, easy to operate. Suit for different needs. Waterproof & Shockproof: Be made of 6061T Aluminum Alloy, waterproof and weather resistant. Applicable to outdoor environment, extreme weather conditions Power Source: Powered by 4 x 18650 3.7V rechargeable battery(Not Included). Internal wiring applies constant current output, can utilize the batteries to a maximum extent. Low-profile Design: High intensity incandescent illumination and the extremely durable polymer body.