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  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.
This red flashlight use one AA battery