Barking Collar Training System Guaranteed to Safely Stop Dog Barking- With 7 Correction Level Safely and effectively stop excessive barking in one minute!, sensitivity adjustable for different dogs, 2 training modes: beeper and static shock. 7 different combinations of beeper and static shock to train dogs effectively. The collar has a safety protection mode to avoid exxessive use. Adjustable leather leash from 6" to 30" to suit different dogs: small, medium and large. Includes receiver, operating manual and replaceable 6-volt battery Works safely and automatically, #1 best anti bark collar system in the market. Free shipping availabe on orders over 2 or more pcs.