For a  large dog, but the collar was cut short. So maximum neck width is about 7inches. Good used condition. No charger. And NO RETURNS DUE TO IT BEING THE 1ST GEN.

NO APP SUPPORT DOES NOT SUPPORT 3G SIGNALS ANYMORE

The SpotOn Virtual Fence Dog Collar in large size is a unique training tool for dogs that utilizes vibration and static/shock control methods. This collar, designed by the first generation, does not require an app for support, making it convenient for pet owners. With the SpotOn Virtual Fence model, pet owners can create a virtual fence for their dogs to stay within designated boundaries and help with obedience training.