Dimensions: 2.4" x 5" x 0.5". 360 degree graduation. Inch and mm scales. Water proof. Romer scale: 1:24k mile, 1:25k, 1:40k, 1:50k. Magnifier. Turnable housing. North/South black/red lines. Scale lanyard. Night use up to 4 hours. Clinometer. Declination adjustment. DryFlex rubber grip.