training dogs no bark collar 7 levels sensitivity adjustable by gear to suit for different dogs

training dogs no bark collar  7 levels  sensitivity adjustable by gear to suit for different dogs     1.    Patented design with small and fine of meniscus shape. 2.    Easy air blowing method to test the collar. 3.    7 levels of sensitivity adjustment by “+” and “-” buttons, to be suitable for different dogs. 4.    2 training modes: beeper and static shock. 5.    7 different combinations of beeper and static shock to train dogs effectively. 6.    The collar turns into 1-minute-automatic protection mode after 7 times consecutive working (pause time must be less than 30s). 7.    Adjustable leather leash from 6” to 30” to suit for different dogs: small, medium and large (not for huge)