Suunto PM-5/360 PC OPTI Clinometer Gear Bags and a wide vision field

and a wide vision field

Rather than use a traditional quick disconnect fitting

the mask is small

By connecting the clip to your watch and a USB to your computer

Suunto PM-5/360 PC OPTI Clinometer Gear Bags and a wide vision fieldScales for slope in degrees and % Accurate measurement of heights and slopes Optical reading of card for higher accuracy The compact hand held Suunto PM 5 clinometer allows to measure heights, slopes, and angles from a variable distance quickly and with high accuracy. This particular model uses a percentage scale. The liquid inside the tool wont freeze or evaporate as long as you stay within the 30 C to +60 C 22 F to +140 F temperature range. Sturdy