GZ27-0008 PVS-14 OP-168 helmet google night vision scope airsoft   Magnification: 2X Objective: 28mm Field of view: 6.4 degree Exit pupil diameter: 14mm Eyes pot distance: 15mm Vseibility regulating range: ±5°C Minimum observation distance: 0.8mm As far as the night viewing distance: >200m Sensor: 1/4? CMOS Horizontal resolution: 420lines Display device: LED Resolution: 330x224 pixel Lighting device: 1R LED Center wavelength: 850mm Working voltage: DV 3V Built in power: AA battery Battery endurance: 1.5/2.5h (1R ON/1R OFF) Switch: 1. The power switch 2. Infared illumination Brightness regulation 3.Forced switch infrared lighting. Weight: 260g(without battery) 310g(with battery)