ALEKO TS-BC052 Anti-Bark Collar Adjustable Sensitivity Dog Collar Easy and convenient to test the functionality and sensitivity by blowing 2 training modes: beeper and static shock 7 different combinations of beeper and static shock to train dogs effectively The collar turns into 1-minute-automatic protection mode after 7 times consecutive working Adjustable leather leash from 6" to 30" to suit for different dogs: small, medium