DE2A Electronic Theodolites 1.Length: 165mm 2.Stadia proportion constant: 100 3.Rechargeable battery: 1800mAh Ni-MH DE2A Theodolites The DE Series model numbers that reflect angle accuracy and have common features. All models have dual displays, and a detachable tribrach. The DE2A has 2\"angle accuracy. Horizontal and vertical angles can be observed simultaneously on the large 2 line, back-lit LCD displays. Other standard features include a horizontal angle zero set, automatic power off to conserve batteries, and a battery life indicator on the LCD display. Model DE2A Length 165mm Objective lens aperture φ45mm Magnification 30X Image Erect Field of view 1°30 Resolving power 3.3 Shortest sighting dictance 1m Additive constant 0 Stadia proportion constant 100 Minimum reading 1 accuracy 2 Display mode Double sides display illuminiation Provide Tilt sencor Provide Compensating range ±3 Magnification 3X Field of view 5° Focusing range 0.5m∞ Plate level 30/2mm Circle level 8/2mm Output interface RS232C Rechargeable battery 1800mAh Ni-MH Battery working time 10-20h Waterproof class IP45 Tribrach type Detachable Working temperature range 30 Dimension 150X165X335 Weight 5kg