New technology for the ProTac HL-X gives users 1,000 lumens of high lumen output, as well as the flexibility of multiple power sources, which helps reduce downtime. Features TEN-TAPA(R) Programming C4A(R) LED illumination output Solid State power regulation provides maximum light output throughout battery life Dual fuel - uses two CR123A lithium batteries (included); also accepts one Streamlight rechargeable 18650 lithium ion battery Durable, anodized aluminum construction Unbreakable pocket clip IPX7 waterproof to 1m for 30 minutes, 2m impact resistance tested Anti-roll head Includes two CR123A lithium batteries and nylon holster