Parameters: 1. The shell material: die-casting aluminum alloy shell circular hollow pillar; 2. Solar panels: 3 v / 100 ma 3. The battery: 1.2 V900mah high-temperature nickel hydrogen battery 4. Light-emitting devices: φ5 ultra bright LED light-emitting diodes (leds) * 6 (double side); 5. Emitting light colors: yellow, red, white, blue, green; 6. Flicker frequency: constants or flashing (2 hz flicker frequency can be customized); 7. Visual range: > 800 meters; 8. Work style: automatic charging during the day, dark light automatically 9. Use time: under the condition of the battery can work continuously to 60 hours 10. Waterproof level: IP68; 11. The service life: effectively use > 3 years; 12. Compressive ability: static pressure > 20 tons; 13. The environment temperature: - 40 ℃ ~ 85 ℃; 14. The dimensions: 132 * 122 * 75 mm; 15. A single weight: 600 g/only