For all of my clients, I recommend they have 3 products: a reputable brand ecollar, a quality prong collar and a place cot! These 3 products will set you up for success at home once your dog has been trained.

The Ecollar technologies Mini Educator (ET-300) is my ecollar of choice for obedience and daily use. For my clients, I have these collars available for purchase at a discounted price. At your dog's turnover, we will go over this ecollar extensively. You may use other ecollars, but I recommend a reputable brand that works consistently and that has a vibrate feature. For hunting dogs, I use the Garmin 550 Pro PLUS for GPS tracking. This collar isn't ideal for daily training, but the GPS feature is useful for hunting. 

For the Prong Collar, you will need a 2.25 mm Herm Sprenger. That size will fit all dogs.