Streamlight Pro-Tac HL 5-X USB Multi-Fuel, High Lumen Professional Tactical Light Features IPX7; waterproof to 1m for 30 minutes; 1m impact resistance tested LED Solid State Power Regulation provides maximum light output throughout battery life Anti-roll face cap Sure grip rubber sleeve Serialized for positive identification. Specifications Output/Runtime Optimized electronics provides thermal management and regulated intensity. TEN-TAP Programming Choice of three operating modes High 18650 USB 3,500 Lumens, 51,000 Candela; 452m Beam Distance, and Runs 1 1/4 Hours High CR123A 2,500 Lumens, 37,000 Candela; 385m Beam Distance, and Runs 1 1/2 Hours Medium 1,000 Lumens, 14,100 Candela, 237m Beam Distance, and Runs 2 1/2 Hours CR123A and 3 Hours 18650 USB Low 250 Lumens, 3,620 Candela; 120m Beam Distance, and Runs 10 1/2 Hours CR123A and 11 1/2 Hours 18650 USB Strobe For Signaling or Disorienting Runs 1 1/2 Hours CR123A and 1 1/4 Hours 18650 USB Material/Lens 6000 Series Machined Aircraft Aluminum with Anodized Finish Light Source C4 LED Technology for Extreme Brightness Switch Multi-function, easy access head mounted push-button switch. One handed operation of momentary, variable intensity or strobe mode. TEN-TAP Programmable switch allows user selection of one of three different programs high/strobe/low factory default , high only, or low/medium/high Battery Multi-fuel uses two Streamlight rechargeable 18650 USB lithium ion batteries; also accepts four CR123A lithium batteries Dimensions 9.53 Length x 2.35 Head Diameter x 1.245 Body Diameter and Tri-Lobe Diameter 2.29 Weight 1 lb 3.4 oz SOLD QUANTITY 1