KOVEA Booster Plus 1 Gas Hose Stove KGB-0603 with    
 Free Additional Silent Damper
  Kovea Booster +1 stove system with fuel bottle and silent damper.
   It's unused, to reduce shipping cost, I remove the original packaging.
   Additinal silent damper is enclosed.
   Silent damper is used.

How to use silent damper

1. Please check the position of the adjustment knob on the provided damper as figure 8. 
2. Remove the existing roarer plate and place the provided damper flat on the fireball.
3. Preheat the stove including the damper, with alcohol or a torch for 30-40 seconds.
4. After preheating, apply pumping and ignite the stove.
   Once the flame is lit, use a long screwdriver to adjust the knob slightly left or right, 
   depending on the flame condition, to achieve the optimal state.

Please refer to following urls.
https://www.youtube.com/watch?v=zhWbTzoKTME
https://www.youtube.com/watch?v=d90DVDlzKi0.