So small. So powerful. This keychain light from nitecore packs 360 lumens on high, is usb rechargeable & provides a runtime as long as 46 hours. The body is made from lightweight aluminum making it drop proof. 4 modes> Turbo: 360lumen, high: 150lumens, med: 35lumens & low: 1lumen. 

SPECS

• BODY: Aluminum
• MAX OUTPUT: 360 lumens
• MAX BEAM DISTANCE: 242 feet
• MAX BEAM INTENSITY: 1400 cd
• MAX RUN TIME: 46 hours
• LED    
• CREE XP-G2
• BATTERTY: Rechargeable Li-ion
• LENGTH:    2.39 inches
• WEIGHT:0.83 oz