Parameters: 1. The shell material: die-casting aluminum alloy shell; 2. Solar panels: 2.5 V / 100MA 3. The energy storage device, high temperature resistant nickel - hydrogen battery 800 ma; 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 >15 years; 12. Compressive ability: static pressure > 9 tons; 13. The environment temperature: - 40 ℃ ~ 85 ℃; 14. Overall size: 110 * 100 * 25 mm; 15. A single weight: 350 g/only