dog training collar 800M remote rechargeable and waterproof dog trainer for 3 dogs

I ordered this set for my dogs. My dogs are 15 months old ( 70 lbs), 8 months old ( 50 lbs). Sometimes they misbehave at dog park or run away from us at our front yard...it was frustrated! So I ordered this training collar set for my dogs and it actually works right away! My husband test on himself for the shock level...because he didn’t want to torture dogs..so level 3 is max. In fact we don’t really need to use shocker just warming sounds, they will respond quick! Also the costumer service is great too, always answer email quick