At 2" long and less than one ounce, the Olight i1R 2 Pro Rechargeable LED Key Chain Light may be the smallest flashlight you own—and also the brightest, with a 180-lumen maximum output comparable to many full-size flashlights. The i1R 2 Pro uses Chip Scale Package (CSP) LED technology and a Total Internal Reflection lens system to deliver a bright, well-balanced beam. Twist the light's head to turn on the low setting and twist it again for high. Power comes from a built-in 130mAh battery with up to 12 hours of runtime, and recharging is a breeze with the included USB-C cable. A red/green indicator light lets you know when the charge is complete.