The EB2 Backup is a slender, compact dual-output flashlight with a stunning 500-lumen maximum output that can be used as a primary or backup light for patrol officers or a duty light for plainclothes officers. It's also ideal for everyday-carry, self-defense, or outdoor applications. The EB2 features an ultra-high-output, virtually indestructible LED emitter and a precision Total Internal Reflection (TIR) lens that create a high-intensity beam optimized for both reach and situational awareness. There are two EB2 Backup models to choose from, differing in the type of tailcap switching: Click-type switch - Partially press tailcap pushbutton for momentary-on high output; press further to click constant-on high. Return to off and press or click again within two seconds for low output. Tactical switch - Partially press tailcap pushbutton for momentary-on low output; press further for momentary-on high output. Release to turn light off. Twist tailcap clockwise for constant-on low and then high output. The EB2's max-output 500-lumen beam is ideal for identifying potential threats and overwhelming their vision. Its five-lumen low-output setting is perfect for reading a map, checking an ID, or navigating in low light with minimal degradation of your dark-adapted vision. The EB2 Backup can run at this low-output level for 67 hours on a set of two 123A lithium batteries, a valuable feature for outdoor, emergency, or other uses where you may not have easy access to spare batteries. A tough, lightweight Mil-Spec hard-anodized aluminum body protects the EB2's sophisticated electronics, and its smooth contours minimize clothing snag and pressure points. A two-way clip permits secure head-up or head-down carry, as well as field-expedient hands-free lighting if clipped to the bill or brim of a hat. Available with either of the above listed tailcap switches in Black or Desert Tan. For a smaller, lighter-weight version of this flashlight, see our one-battery .