Securitylng 600 Lumens XM-L U2 LED Professional Diving 70M Flashlight with Twist Switch (18650 Battery Not Included) Adopts Cree XM-L2 LED chip,the maximum brightness can be up to 600 Lumens. Internal wiring applies the high efficient booster circuit, and can utilize the batteries in the largest extent.With the anti-shock and corrosion-resistance features The body of this flashlight is built of aircraft-grade aluminum alloy, and it has a very solid construction. Ultra-deep trench structure skid-proof effect is excellent when diving. Military grade: Widely used by Diving lovers, Military, Police forces and Officer.etc. Steady long time working performance.Power Source: 1 x 18650 Rechargeable Battery (Not included).