Features:

• DT-NH831D is a new product based on the latest optoelectronics technology. It uses high-performance second-generation/third generation image intensifier. It has the characteristics of excellent performance, small size, light weight, clear image, simple operation, high performance-price ratio, and the magnification can be changed by replacing objective lens (or connecting multiplier lens). 
• The fuselage is made of all metal. It is small in size, lightest in weight and high in strength.
• Good optical quality, clear imaging, high brightness, uniform brightness throughout the observation range.
• Skillful design and high-quality image tube are adopted to maximize the cost-performance ratio of products.
• The product has strong practicability and can be applied to military observation, coastal defense reconnaissance, public security surveillance, forensics, customs anti-sm ling, etc. 
• Waterproof IP65 or IP67

Specs：

• Model: DT-NH831D
• IIT: Gen3
• Magnification: 1X
• Resolution ( LP/mm): 51-63
• Photo cathode type: GaAs
• S/N（dB）: 18-25
• Luminous sensitivity（uA/lm）: 500-700
• MTTF（hrs）: 10,000
• FOV（degree）: 42+/-3
• Detection distance（M）: 250-300
• Adjustable range of eye distance: 65+/-5
• Diopter range: +5/-5
• Lens system: F1.2, 25mm
• Coating: Multilayer broadband coating
• Range of focus（M）: 0.25--∞
• Auto anti strong light: High sensitivity broadband detection
• Rollover detection: Solid non-contact automatic detection
• Dimensions（mm）: 115x127x69(No eyeshade)
• Material: Aviation aluminum
• Weight（no battery）: 645g
• Power supply: 2.6-4.2V
• Battery type: CR123(A)x2
• Battery life（H）: 80(IR OFF)  40(IR ON)
• Operating Temperature（℃）: -40/+50
• Relative Humidity: 5%-98%
• Waterproof： IP65（IP67 optional）