Three RGB flashlights are included in the package: red LED flashlight, green LED flashlight, and blue LED flashlight. Each flashlight uses a powerful 3535 LED bulb and emits true red, green, or blue light. They are RGB flashlights designed for optical effects and other applications. Requires AA batteries (size AA); batteries are not included. Red and green light are less disturbing to animals in low light, making these flashlights useful for night observation without disturbing wildlife. The red light is also helpful for astronomy and aviation tasks, such as reading charts, checklists, or other documents. The blue flashlight is useful for fishing. Under blue light, the reflective paint on floats shows a slight fluorescence, allowing the float to be seen clearly with minimal glare. Use scenarios: - Night wildlife observation: use red or green light to locate animals quietly without disturbing them. - Astronomy or aviation work in the dark: use the red light to read charts, checklists, or documents. - Fishing or boating at night: use the blue light to view floats more clearly due to slight fluorescence with low glare.