*Telescope:?
Length : 150 Millimeters
Objective lens Diameter : 45mm (ED:50mm)
Magnification : 30X
Image : Erect
Field of view : 1°30’
Resolve power : 2.8"
Min. Focus Distance : 1.3 meters

*Measurement range
1 Prism : 3,000 meters (9,900ft)
Mini Prism : 1000 meters (3,280ft)
Non-Prism mode : 1.5-350m (5-1148ft)

*Measuring accuracy
- Prism Mode
±(2mm+2ppmxD*)m.s.e. fine,
±(7mm+2ppmxD*)m.s.e. coarse
- Non-prism mode
±(3mm+2ppm) m.s.e. fine,
±(10mm) m.s.e. coarse
- Minimum reading
0.2mm(0.001ft.) / 1mm(0.005ft) fine,
1mm(0.005ft) / 10mm(0.02ft.) coarse,
10mm(0.02ft.) tracking
- Measurement time
1mm:1.1 sec.(Initial 2.5 sec.) fine
0.2mm:1.5 sec (Initial 3.0 sec.) fine
0.8 sec.(Initial 2.5 sec.) coarse
0.5 sec.(Initial 2.5 sec.) tracking
- Measurement time (non prism)
(up to 100m. At longer distance and/or poor reflective surface?time will be longer)
1mm:1.7 sec.(Initial 3.0 sec.) fine
0.2mm:2.6 sec (Initial 3.5 sec.) fine
1.0 sec.(Initial 2.0 sec.) coarse
0.4 sec.(Initial 2.0 sec.) tracking

*Angle measurement
Method : Absolute
Detection:
GPT-3102N : 2 sides horizontal,?2 sides vertical
Minimum reading:
GPT-3102N : 1"/5" arc sec, 0.2/1 mgon
Accuracy:
GPT-3102N : 2" arc sec (0.6 mgon)
Diameter of circle : 71 Millimeters

*?Tilt correction
Type : Single or Dual Axis (GPT-3107N: single)
Compensating : ± 3’
Range correction unit : 1" arc sec, 0.1 mgon

*Environmental?
Circular level sensitivity : 10’ /2mm
Plate level sensitivity : 30" /2mm/40�/2mm (GPT-3107N)
Optical plummet3x Magnification,
0.5m to infinity Focusing Range,
Erect Image, 5° Field of View
Laser pointer ?LD (Visible Laser) light source,
690nm wave length,
1mW Maximum output,
Class 2 (IE Publication 825)
Class II (FDA/BHR 21 CFR 1040) class
Dimensions (HxWxL) 336(H) x 184(W) x 174(L) mm
13.2(H) x 7.2(W)? x 6.9(L) inches
Instrument Weight (with battery) : 5.3 kg (11.6 lbs)
Case weight : 3.4 kg (7.5 lbs)
Dust/Water protection : IP66 rating
Operating temperature : -20° to +50° Celsius, -4° to +122° Fahrenheit

*Power
Source : NiMH Battery BT-52QA
Output voltage : DC 7.2?volts
Capacity : 2700mAh
Approximate battery life (when fully charged at 20°C ) : 5.0 hours including distance measurement, 45 hours Angle measurement only

*? Battery Charger
ID : BC-27
Input Voltage : AC100-240 Volts
Frequency : 50/60 Hertz
Recharging Time : 1.8 hours
Operating temperature : +10° to +40° Celcius, +50° to +104° Fahrenheit