BST-4 in Digital Compass Binocular Power:10xObjective Lens:25mmType Of Prism:BK7Focus System:Cent.Minimum Focus Distance:5mOther Feature:DIGITAL SPECS POWER: 3v button cell (CR2032) DIGITAL COMPASS DISPLAY: 1.6 inches LCD DIRECTION PRECISION: ± 3° BEARING RESOLUTION: 1° THERMOMETER RANGE: -5ºC/+50ºF;+23ºC/+122ºF DISPLAY: ºC/ºF RESOLUTION: ±2ºC STOP WATCH RINGE: 0-9 min 59.99 sec PRECISION: ±1/100sec WATCH TIME FORMAT: 24Hr Diopter System:Right EyepieceField Of View:ANGLE 5.6º; 288ft (Ft/1,000Yds) ; 96m (m/1,000m)Eye Relief:10mmWater Proof:NONitrogen Filled:NOSize:118x110x46 (mm)Weight:365g