The DE-2B is a type of Digital Electronic Laser Optical Theodolite, widely used in construction engineering and surveying. like establishing alignments, measuring horizontal and vertical angles, and leveling.

Digital Electronic Laser Optical Theodolite Parameter Specification Table：

Model Number	DE-2B/ DEL-2R/DEL-2G
Telescope	Telescope Length	155mm
	Image	Erect
	Objective Lens Aperture	45mm
	Magnification	30X
	Field Of View	1°30'
	Resolving	3"
	Minium Foucs Distance	1.35M
	Stadia Multiplication Factor /Constant	100/0
Angle Measurement	Code type	Absolutely Code
	Display Plane	Double backlit LED
	Display Resolution	1"/5"/10''
	Accuracy	2" or 5''
	Circle diameter	79mm
	Measuring unit	360°/400gon/6400mil
	Tilt Sensor	Yes
	Compensation Range	±3'
Optical Plummet	Magnification	3X
	Field Of View	5°
	Focus Range	0.5m～∞
Laser Pointer and Laser Plummet	Laser Range	180m/250m
	Laser Range	200m
	Wave Length	635mm
	Power	5mw
	Laser Spot Diameter	2mm/100m
Level Sensitivlty	Cylinder Bubble	30"/2mm
	Circular Bubble	8"/2mm
Power	Rechargerable Battery	Li-ion 7.4V 1650mAH
Working Temperature	﹣20° ~ 50°C
Stand Accessory	Suit Case, Rechargeable Batteries, Charger , Dry Battery Case,Plumb Bob, Correct Pin, Cross Screwdriver, soft brush and cloth,Laser Target

Digital Electronic Laser Optical Theodolite Surveying Instrument for construction Engineering Survey DE-2B