Feature Digital Night Vision a Clear Night Vision and Recording: 3x Digital Zoom + 850nm IR Illuminator Enables Human Identification up to 200 Meters in Darkness a Crisp, Energy-Efficient Imaging: CMOS Camera Sensor Provides Sharp Digital Vision Across All Lighting Conditions a Sharp Close-Range Focus: Adjustable Objective Lens Allows Precise Observation as Near as 20cm for Detailed Viewing a Helmet-Mount Ready: Lightweight, Rugged Flip-Up Mount with Adjustable Two-Piece Design Ensures Secure and Easy Attachment Video Helmet Flip-up Mount Kit a To Connect OWNV-10 Night Vision onto the Helmet. Made of Alu 6061-T6a Adjustable, 2 Pcs Combo, Flip-up-down Style, Light Weight, Easy of Usea Check the video for installation illustration Specification 1x18 Digital Day & Night Helmet Head Mounted HD Optical Magnification: 1x Objective Lens: 18mm Length: 98mm 3.8in Height: 58mm 2.3in Width: 80mm 3.1in Digital Zoom: 3x Focal Length: 20mm 0.8in Lens Coating: Ultra wide band infrared anti-reflection film Optical Resolution: 11" Detection Range in Dim Light: 0.2 meters to 300 meters Detection Range in Darkness: 0.2 to 200 meters (with IR illuminator ON) Observation Range in Darkness: 0.2 to 100 meters (with IR illuminator ON) Camera Sensor Type: CMOS Camera Resolution: 1920x1080 Field of View: 25.5Adegx14.5Adeg Eye Relief: 20mm Display Resolution: 1280x720 LCOS Objective Lens Focus: 20cm to infinite Spectrum Range: 450-1100nm Diopter Adjustment: -5 ~ +5 LED IR Illuminator Wavelength: 850nm LED IR Illuminator Power: 1W (3 levels) Min Illumination: 0.0001 Lux Photo Mode: Yes Video Mode: Yes APP: WIFICAMERA (Android) Material: ABS Plastic + Rubber Battery Type: 1 pc 3.7V rechargeable 18650 lithium(not included) Battery Runtime: 5 hours IR OFF / 3 hours IR ON Operating Temperature Range: -40 to 55 Electronic compass Automatic white balance Display Background: white-&-black, green Weight (with battery): 245g 8.6oz Automatic or manual control display screen brightness IP66 water proof Accessories: cleaning cloth, battery, charger set, lens cover, instruction etc Need OWNV-MT10 helmet flip-up mount kit for installation Helmet Flip-up Mount Kit Diameter: 21.5mm 0.85in The 1st lever for clamping the cylinder mount The 2nd lever mount can control the damping force to flip up and flip down the monocular night vision The 3rd lever mount will lock the position between helmet and whole mounting system Weight: 130g / 4.6in Made of Alu alloy 6061-T6 Quick detach and release mount to the helmet 2 pcs combo, easy of use Check video for installation illustration