Features:

• Bark-control collar sends harmless static shock to the dog whenever it barks
• Adjustable nylon collar senses vibration in dog's throat during barking
• Lightweight receiver perfect for toy or small breeds
• Includes water-resistant receiver, operating manual and replaceable 6-volt battery
• Receiver measures 1.75 x 1 x 1.25 inches; limited lifetime warranty

Editor Reviews:

Product Description:
BARK CONTROL COLLARAdjustable collar 6" to 28"6 levels of correctionIncludes training video and 6 volt alkaline battery10 yr. warranty

Rating : - Works great.
I bought these collars for my beagle, dalmatian and border collie. My husband often works from home and can't have his clients hearing the barking of our dogs all day when someone passes our house (or a house half a block away). These were very effective, and I would recommend them.