Geomaster/China offer professional Surveying Equipment--Drafting Machine,Pocket Stereoscope,Optical Plane-Table Alidade Digital Planimeter: QCJ-2000 

Model	QCJ-2000
Type	Roller
Accuracy	±0.2%
Measuring Range	Width: 300mm; Length: unlimited
Display	LCD, 16 Digits; Size: 64.5×13.8
Power Supply	Input: Adaptor: AC: 100~240v, 50Hz Output: DC: 6v, Ni-H rechargeable Battery (built-in)Battery Life: up to 10000 charging times
Standard Accessories	AC Adaptor, Plastic Carrying Case, User Manual
Packing Details	Instrument Dimensions: 260mm×180mm×40mm N.W.: 1.25kg (w. Carrying Case) 10pcs per Carton; 22kgs per Carton; Size per Carton: 0.09CBM (90cm×23cm×44cm)

Note: the above specifications would be subject to change without prior notice.

Features

A: The following units of measurement (Metric and British Systems)can be preset:

1. Hectare (ha), square kilometer (km2),square meter (m2), square centimeter(cm2)

2. Acre (ac), square mile (mile2), square foot (ft2), square inch (in2)

B: Memory function (8 memory elements) for different measuring purposes

C: Cumulative measurement for larger areas

D: Averaging measurement for more precise areas

E: Easy conversion between different units of measurement