Features:The direct-read compass capsule of this transit features 1 degree resolution and 1/2 degree accuracy.And the dry compass capsule of this quick dampening needle features both a needle-lock to protect the compass assembly during transit and gear driven adjustable declination to allow for simple compensated bearings.The vertical angle clinometer scale featuring 1 degree increments has a range of 90 degrees or 100% grade scale with an accuracy of 1/2 degree. A percent grade scale features incremeThis lightweight and durable transit compass was designed for the specific tasks required of geologists, surveyors, mining engineers, civil engineers, environmental engineers and foresters.The digital altimeter is designed for outdoor use, the detachable string makes the digital compass a perfect hand-carry device for various outdoor activates