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Product specifications:★Extension: 2X★Target: 28mm★Field of view: 6.4°★ Pupil diameter: 14mm★ Eye pot distance: 15mm★ Parallax: ±5°★ Minimum viewing distance: 0.8mm★ Night vision distance: > 200 meters★Sensor: 1/4 CMOS★ Horizontal resolution: 420 lines★Display device: LED★ Resolution: 330x224 pixels★ Lighting device: the first led★Center wavelength: 850mm★ Working voltage: DV 3 V.★ Built-in power supply: AA battery (not included)★ Battery resistance: 1.5 / 2.5 H (1R in / 1r off)★ Switch: 1. Power switch 2. Infrared light brightness adjustment 3. Forced infrared light switch.