Feature: 1. EXTERNAL INFRARED ILLUMINATOR: 4x night vision monocular external infrared illuminator for all weather 2.5‑500m precise locking. 2. MULTIFUNCTIONAL DESIGN: Night vision monocular with camera, sound and video capabilities. Quick change clamps to fit a variety of models. 3. 4X DIGITAL ZOOM: Night vision infrared monocular supports 4x digital zoom, day and night, HD imaging, and ir assist. 4. CLEAR OBSERVATION: Digital night vision monocular provides clear viewing of targets in daytime, nighttime and low light environments. 5. EASY TO CARRY: Monocular night vision goggles are compact, easy to carry and use, with high impact resistance. Specification: Item Type: Night Vision Monocular Material: Aluminum Alloy Voltage: 100-240V Objective Lens Diameter: Approx. 50mm / 2.0in Optical Zoom: 4X Focal Length Adjustment: Manual Adjustment Nearest Observation Distance: Approx. 2m/6.6ft Eye Relief: Approx. 50mm / 2.0in Night Vision Device Battery Type: Lithium Battery, 1 x 18650, Battery Capacity: 2200mAh (Shipped With Matching Battery) Diopter Adjustment: ±6 Sensor (CMOS): 1/3 Inch CMOS Resolution: 728x488 Infrared Light Wave: 940nm 850nm Observation Distance In Low Light: Approx. 2.5-500m / 8.2-1640.4ft (Under Natural Starlight) Observation Distance In The Dark: Approx. 2.5-300m / 8.2-984.3ft (External Light Assisted) Spectral Range: 400-1100nm Storage: Support 4-32G Small Memory Memory Card (Not Included) Auxiliary Infrared Lighting Flashlight Power: 1W Flashlight Battery Type: 1 x 14500, Lithium Battery, Battery Capacity: 800mAh (Shipped With Matching Battery). Package List: 1 x Night Vision Monocular2 x Instruction Manual1 x Plug1 x USB Cable1 x Battery Charger1 x Wrench1 x Cleaning Cloth2 x Battery1 x Sound Cable1 x Storage Bag1 x Storage Packet Note: Please allow some error due to manual measurement.