BESTSUN High Power Bright Red Light LED Flashlight, Powerful Single Mode Red Flashlights, Zoomable RED LED Red Light Torch for Astronomy, Aviation, Night Observation, Star Gazing, Hunting This one mode single mode red light flashlight is specially designed for night activties. Human's eyes are most sensitive to the Red range of light, but animals are not spooked by a Red LED flashlight, so this red light is very helpful to find the animals in the dark, like hogs, coyotes, fox...are less sensitive to the Red light, so you can find them without disturbing them. This Red night flashlight is also specially designed for observers, night observation is effective but hard to find the target, if you use the white light, animals will hide from you, you are not able to watch their natural behavior at night, so, this night light flashlight is very helpful to find the animals in the dark, help you watch turtle, snakes, and the reptiles. Single mode one mode flashlight: 1 switch mode(On/OFF), 1 mode red LED flashlight. You may be bored with switching 3 modes or 5 modes of other flashlights to find the right mode you wanted, this ONLY ONE mode flashlight is just for you. You slide the head of the flashlight back and forth for zooming light in and out, zoomable LED for more than 300 yard long range light beam; The red light can be used for sending signal, for asking help, for warnings This red flashlight use three AAA battery, or one 18650 battery(Use 18650 battery are much brighter than use AAA battery, but 18650 battery will generate more heat than AAA battery on flashlight house. Please choose the battery type by brightness your like.