Model DQL-7 is for measuring azimuth, distance, slope, height and mileage.
The instrument can also be used to measure the simple map. There's some luminous powder on the instrument's suitable parts for using it at night.
Measuring proportion:1:100000 1:75000 1:50000 1:25000
Clinometer reading error:?�?1.25°
The scale of dial for time and speed:5 min
Size:68 ?� 63 ?� 26mm