Been running an Alpha 100 with three TT 10 collars for 5 years. I hunt my dogs (GSP) over 100 days every year. I hunt wide open places, timber and big canyons. I just got online and updated all collars and the receiver for free. The service has been great. I like the correction mode because those crazy GSP will hunt anything; such as chasing antelope just for fun. A good zap will stop that; can you spell porqupine? How about rattle snake, black wolf or bobcat. It also has a tone only mode that works great on a trained dog. The cost is pricey, but I love my dogs.
Best wishes
