1. Power supply: 2 x AA batteries for 10 LEDs, 3 x AA batteries for 20 LEDs/40 LEDs (batteries are not included) 2. Mode: 10 lights are always on, 20/40 lights are always on + flashing 3. Input voltage: 3V 4. Luminous flux: 2 (lm) 5. Control method: switch 6. Shell material: plastic 7. Suitable for scenes: Thanksgiving, Halloween