(A) The Halo Collar 4 is a revolutionary GPS wireless dog fence system that provides real-time tracking for your furry friend. With customizable sound and vibration control methods, you can training your dog effectively. The rechargeable collar is designed for most dog sizes and breeds, making it a versatile solution for pet owners. Using Bluetooth smart home protocol, you can easily monitor your dog's movements and ensure they stay within the boundaries of your yard. Made in Taiwan by the trusted brand Halo, this product offers peace of mind and convenience for pet owners.