FLASHLIGHT IR PORTABLE INFRARED FLASHLIGHT 5IN - Rotate the flashlight head to enlarge or reduce the light to enlarge or decrease. - Plain waterproof standard O-ring seal, waterproof, can be used on rainy days. - Constant current drive lowering voltage, two-mode DC-DC converter has high efficiency. Replace the battery when the light is too dark. - Focusing infrared flashlight 850nm night vision, camera fill bulb, monitor light source filling the light. - Widely used in outdoor activities such as mountain climbing, camping, hiking, forest exploration or used at home such as repairing or finding trifles. Specification: - Item Type: Flashlight - n in the pictures Product Size: approx. 13,6-15,8 cm/5,4-6,2 inch (length of retractable flashlight) Lamp head diameter: 3.5 cm/1,4 inch Weight: approx. 165 g/5,8 oz Material: aerospace aluminum alloy Lens: transparent magnifier with anti-reflective coating Bulb: 5W 850NM Infrared light range: up to 30-100 meters/98,4-328,1 feet Working time: 1,5-5,5 hours (depending on battery capacity and mode selected) Lifespan: average 10 000 hours - Operating voltage: 0,8 V-4,2 V - Power supply: 3xAA or 1x18650 (without battery) - Switch: end cover push-button switch List of packages: - 1 x Flashlight - 1 x Battery Conversion Housing Note: This portable flashlight is not a lighting flashlight, but an infrared flashlight. It is mainly used for filling with light a night vision instrument or infrared camera. When it comes to the exposure distance of the flashlight: how many meters an infrared emitting tube can have, it is a system problem, we cannot simply say how many meters it can be, it also affects the size of the group of lamps, circuit, camera, lens, etc.