1. Gas capacity in air cell: 8.5 litre

2. The weight of compressed gas in air cell: 17g

3. Inflating time: Below 5 seconds

4. Buoyancy: 10kg

5. Min expiry time of gas storage: 5 days

6. CO2 gas storage cylinder: To be used only once but can be replaced.

7. Lighting up time by using batteries above 8 hours

8. Air pressure in air cell below 0.2kg

9. Dip angle of head and shoulders above the surface of water: 30-40degree.

10. Freeboard(the distance between mouth and the surface of water above 120mm

11. Assembly with speaker for help and glisten shoulder mark with double tones.

12. Lifejackt light: Lithium battery or water battery.

Vest type l

The reasonable distribution air chamber can overturn the person body automatically in order to make people head higher 120mm water surface.