LUX-PRO focus390 lumens LED HANDHELD FLASHLIGHT WITH TACK GRIP! enlarged due to this being a compact flashlight.it has seemless push/pull focushead that can be adjusted with one hand.with 4 lighting modes,users can get the light they need for any situation..acsess to 390 lumens on high,110 on medium,and 23 on ultra-low..many more details to include but notb limited to extended run time if ran on low to a mind boggleing 40hrs run time...