A compact-sized gadget with amazingly powerful function for lighting! This OLight (S15R) XM-L2 Built-in Battery High Brightness Aluminum Alloy Coating Flashlight must surely become the right choice for whoever seeks for a reliable flashlight. Built-in rechargeable battery ensures continuous lighting performance， and can be reused. Providing 4 kinds of power voltage settings， it could perfectly meet your different demands. Coated with superior hard anodizing aluminum alloy， it is durable to use. This flashlight also features good memory function， reverse polarity protection and so on. Good choice!                                    Features            Highly reliable 6061-T6 aluminum alloy structure with ant-scratch， Type-III hard anodizing treatmentRemovable two-position pocket clipNew glow-in-the-dark O-ring in bezel to help locate flashlight from accidental drops99% light transmittance rate through tempered glass， with two-sided anti-reflective coatingMulti-function side switch with four brightness levels， plus a strobe modeAutomatically return to your last brightness level with the built in memory functionFlat tail-cap with strong magnet， giving you the ability to use the light as a hands-free gadgetReverse polarity protection to prevent improper battery installation                                                             Specifications            Brand    OLight    <br>Model    S15R    <br>Emitter Type     XM-L2    <br>Light Source    LED    <br>Power    10W    <br>Color Temperature    6000℉    <br>Working Temperature    30℉    <br>Lifespan    5000 Hours    <br>Light Color    White    <br>Light Range    150m    <br>Luminous Flux    600LM    <br>Battery    750mAh 3.7V 14500 Rechargeable Lithium Battery    <br>Dimensions    (3.60 x 0.91)" / (9.14 x 2.30)cm (L x Dia.)    <br>Weight    2.36oz / 67g    <br>                                                            Package Includes            1 x Flashlight<br>1 x 750mAh 3.7V 14500 Lithium Battery<br>1 x Charger Base<br>1 x Micro USB Cable<br>2 x O-shaped Rings<br>1 x Lanyard<br>