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 slide the head of the flashlight back and forth for zooming light in and out, zoomable LED for more than 150 yard long range light beam; The red light can be used for sending signal, for asking help, for warningsThis red flashlight use one 1.5V AA Size battery, or other rechargeable battery as the AA battery Size but the max Voltage is 4V. The higher voltage input, the brighter red light emit, and the more heat generate on flashlight house, Please choose the battery type by brightness your like.