IR 850nm/940 nm LED Infrared Flashlight: Product Description Zoomable Focus IR850nm/IR940 nm LED Infrared Radiation IR Lamp Night Vision Flashlight Torch： -INVISIBLE IR LIGHT: Emits infrared light with 940 nm/850 nm wavelength, Suitable to use with a night vision scope, NVS, NVG DIY, camera phones, monocular, goggles and camera which doesn't block infra red light -Handheld IR Illuminator use of night vision for hunting -Adjustable Focus Night Vision Hunting Flashlight -Perfect illuminating enhancer to your monocular or scope night vision device -Made from aircraft-grade aluminum and features an all-glass lens for enhanced clarity -With O-ring sealed, is able to use in the wet rainy day -Use Battery Type: 1x 18650 3.7v or battery(dont include) Features: Color: Black Switch diameter: 2.5cm. Mount dia: 25.4mm diameter Material: Aluminum Alloy + Plastic Item Diameter: 25.4mm Life times:about 5－6hours Working range:20-35mm