The Streamlight Polytac X Flashlight offers 600 lm output and the versatility of a rechargeable battery option. This light can be powered by two 3V CR123 lithium batteries or one Streamlight rechargeable 18650 lithium ion battery. The Polytac X Flashlight offers high, medium, low and strobe power modes. When using CR123 batteries, the light offers a run-time of 2.75 to 34 hours; when using the 18650 battery, the light offers a run-time of 3.5 to 36 hours. This light features a durable case made of high impact nylon polymer that helps provide a sure grip. The light weighs 4.34 ounces, measures 5.46" and is IPX7 rated. The Polytac X Flashlight is available in black, yellow or coyote.