This single mode red light flashlight is specially designed for night activities. Human 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 animals in the dark, like hogs, coyotes, foxes... 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 can't watch their natural behavior at night, so this night light flashlight is very helpful to find animals in the dark, helps you watch for turtles, snakes, and reptiles..Single mode flashlight in one mode: 1 switch mode (On/Off), 1 mode red LED flashlight. You push the flashlight head back and forth to zoom in and out the light, zoomable LED for over 135 yard long light beam; The red light can be used for sending signals, for asking help, for warnings. This red flashlight uses one 1.5V AA battery or other rechargeable battery that AA battery size but the maximum voltage is 4V. The higher of the voltage input, the brighter of the red light it emits and the more heat it generates on the flashlight housing, please choose battery type depending on the brightness you like._QUDD