Feature: 1. Reduced voltage constant current drive, dual ‑ mode DC‑DC converter for high efficiency. 2. Ordinary waterproof standard O‑ring sealing, waterproof, can be used in rainy days. 3. Made of high quality aviation‑grade aluminum alloy material, sturdy, durable and long service life. 4. Focusing infrared flashlight 850nm/940nm night vision instrument, camera flashlight, monitoring light source. 5. LED chip in the flashlight turns red when the light is lit, but the beam needs to be detected through a night vision device or a non‑infrared filter. Specification: Item Type: Infrared Headlight Material: Aviation-grade Aluminum Alloy Lens: Transparent Anti-reflective Coating Magnifying Glass Bulb: 5W 850nm Weight: Approx.210g/7.4oz Infrared Light Range: Up to 30-100m/98.4-328.1ft Lifespan: an Average of 10,000 Hours Working Voltage: 0.8V-4.2V Switch: End Cover Press Switch Impact and Sliding Body Design Power Supply: 3 x AAA or 1 x 18650 (not Including Battery) Running Time: 1.5-5.5 Hours (Depending on Battery Capacity and Mode Selection). Package List: 1 x Headlight Note: 1. This portable flashlight is not an illuminating flashlight, but an infrared flashlight, which is mainly used for night vision devices or infrared cameras.2. Light source: The light source under the detection of the mobile phone camera is light pink, which can detect whether the infrared flashlight is working normally or distinguish between the 850 band and the 940 band (note: this model cannot fill the light for the mobile phone camera)3. Purpose: Mainly used for night vision, infrared camera supplement light, etc.Infrared invisible light flashlight is used for non‑light auxiliary shooting (it has no shooting function), infrared night vision, night vision auxiliary lighting equipment, and infrared shooting auxiliary lighting equipment. There is a red light exposure when working at 850nm, and there is no red light exposure at 940nm. The so‑called red light exposure refers to whether the wick can see red light in the working state. When the 850nm wick is working, it can be seen that the wick is a red dot, but the emitted light will not be seen. 940nm is almost I can’t see the light of the wick and no light is emitted, but the shooting effect of 850nm is better than that of 940nm. Therefore, it is recommended that buyers do not want to have red storms or do experiments (some experimental equipment requires 940nm band) but general It is recommended that you use an infrared transmitter with 850nm band for shooting purposes. Regarding the exposure distance of the flashlight: how many meters the infrared transmitter tube can be is a system problem, we can't just say how many meters can be, it is also affected by the size of the light group, the circuit, the camera, the lens, etc.