Key performance indicators: 

 All Black Environment Watch: Yes 
 Magnification (times): 3 
 Objective Diameter: 44mm 
 Image intensifier Level: 1 + 
 Viewing distance (m): 400 
 Recognition distance (m): 200 
 Field of view (degrees): 13 
 Diopter adjustment (degrees ):+/- 4 
 Resolution (line pairs / mm): 45 
 Power supply type: a 3.6V lithium battery 
 Focus Range: 1.5 m to infinity 
 Continuous working time (hours): 48 
 Dimensions (mm): 81 x 203 x 61 
 Weight (grams): 530 
 Tripod: Support 
 Contact: Zhang Ran QQ: 5.6.5.9.0.5.1.1.2 
 Phone :010-51 .9.2.2.5.72 
 Come Web site for more information: http #://# www. # Ehui # gou. # Com / (remove the #) 
 Address: 47 Fuxing Road, Haidian District, Beijing Jian Business Building, No. Sky # 1605