The PetSafe PUSB-300 ultrasonic bark collar comes with a nylon collar or it can slide right onto your pet's existing collar, controlling barking with loud sounds. The adjustable sensitivity levels allows you to customize it for your dog's unique bark. And uses built-in microphone, to deter from barking, it emits a loud sound that startles your dog and discourages them from barking. This collar is one of the lightest and smallest collars on the market.

Features:

• Lightweight collar
• Most effective for smaller dogs
• Uses ultrasonic sound to interrupt and deter barking
• Adjustable sound sensitivity
• Uses PetSafe battery RFA-67D-11(battery not included)
• Owner's manual included
• Not recommended for use for more than 8 hours at a time

Product Specs: 1H x 2W x 1D, Frequency: 4 kHz