Product name:       Revtronic F20B Cree XM-L2 U2 18650 LED Flashlight           Brand:       Revtronic           Model:       F20B           Emitter Brand       Cree           Emitter Type:       XM-L2 U2           Material:       Aluminum           Total Emitters:       1           Mode:       Low、Mid、High           Max Lumens:       650LM           Max Runtime:       19hrs           Battery Configurations:       1 x 18650 \/ 2 x 3V CR123A Batteries (Included 18650 )           Switch Type:       Clicky           Switch Location:       Tail cap           Peak Beam Intensity:       4000cd           Impact Resistant       1m           Range:       126m           Waterproof:       IPX-7           Weight:       69g           Size:       130mm(L) x 25.4mm(Body) x 23.5mm(Head)   Features:1. Cree XM-L2(U2) LED with a lifespand of 50、000 hours2. Digitally regulated output - maintains constant brightness3. Low-voltage warning function to remind you to replace the battery4. Anti-roll、 slip-resistant body design、 removable pocket clip5. Tactical tail switch with momentary-on function6. Made of durable aircraft-grade aluminumPackage included:1 x Revtronic F20B Cree XM-L2 U2 18650 LED Flashlight1 x 2600mAh 18650 battery1 x Clip1 x Holster1 x O-ring1 x Charger1 x User manual