NiteCore MT1A 180 Lumens Compact Mini LED Flashlight w/Clip & Bonus Lumen Tactical Keychain Light - Use 1 x AA Battery Maximum 180 Lumens output with 5 brightness levels, Strobe, and SoS modes Convenient two-mode interface to access your desirable brightness level and mode Subcompact size that fits in palm, pocket or purse; 1.94 oz only Support battery type: 1x AA Also includes a bonus lumen tactical keychain light