Pets:Dogs:Collars

I'm looking at collars for our dogs on the farm.

• Hunting:
  • https://www.aliexpress.com/item/32665636858.html
    • Seems to be a later version of:
    • https://www.aliexpress.com/item/1005003178868716.html
    • https://www.aliexpress.com/item/1005004697856045.html
• GeoFencing:

  • (GPS):
    • https://www.aliexpress.com/item/1005004450392744.html
    • https://www.aliexpress.com/item/1005001488986919.html
    • https://www.aliexpress.com/item/1005004887584079.html
  • 2.4Ghz
    • https://www.aliexpress.com/item/1005003636325545.html
      • Supposedly improves interference…Hum…?