The i1R 2 is built from aluminium alloy and features a built-in rechargeable Li-ion battery that charges through a Micro-USB port without disassembling the light. With its compact size and dual modes(5 and 150 lumens), the i1R 2 is the perfect keychain flashlight for everyday carry. Changing outputs (5/150 lumens) is simple just by twisting the light head. The I1R EOS is the perfect daily carry keychain flashlight with high output, convenient charging, and easy mode changing. With a compact body that's shorter than a AAA battery and slimmer than a pinky finger, the i1R reaches a monumental 150 lumens of brightness.FEATURES Lightweight and Tiny. The entire light is slimmer than a pinky finger with a length shorter than a AAA battery and weight at only 13g. Rechargeable through a built-in Micro-USB charging port. Fully charged within 75 minutes. ON/OFF and output changes are controlled by twisting the flashlight head. Twist it slightly to turn it on at 5 lumens and a bit further for 150 lumens. If your Olight product has any defect within 12 months of purchase, the product can be returned directly to Olight or 4Cabling for repair or replacement.