Haglöf's new ECII-D electronic clinometer and height meter is even simpler to operate and now calculates distance as well!. The three button design makes it very easy to measure tree heights and slope angles. By placing a reference mark at 2m on the tree or object to be measured the ECII-D will automatically calculate the distance to the object and then the height of the object. Alternatively, the user can measure the distance to the object and enter this into the ECII-D to then measure the height. Can also operate as a slope or incline measuring instrument. Extremely small yet powerful and rugged and uses 1 x "AA" battery. Can also operate as a slope or incline measuring instrument. Very compact - 20x63x44mm, 50g. Bright orange for easy identification. Made in Sweden.