Models M1 and M3 LED task lights feature side-located button for simple, one-handed operation. Aluminumfeatures no-slip diamond pattern and anodized finish. Lights run on CR132 lithium batteries. Model M1, with 1-w. LED, provides 26 lumens of brilliance for up to 3 hrs. Model M3 offers 3-w. LED that casts 56 lumens of brilliance for more than 6 hrs. Both models work well in cold weather.