Features:
* The lightest bark collar available; weighs only 1 ounce! Great for even the smallest dogs.
* At 1.9 cubic inches, it is by far the smallest you can buy.
* Can be attached to your existing collar (1" width or less, non-metallic collar) .
* Adjustable bark sensitivity settings.
* Uses loud, but harmless audible sound to deter barking.
* Liftetime warranty