Dimensions: 2.2" x 4.4" x 0.4". 360 degree graduation. Scales: inch and mm. Waterproof. Romer scale: 1:24k mile, 1:25k, 1:40k, 1:50k. Magnifier. Turnable housing. Red and black North/South lines. Scale lanyard and slope card. Night use up to four hours. Clinometer. Declination adjustment. Clam packed