AKKEE Dog Training Collar Rechargeable & Waterproof Electric Dog Shock Collars Remote 1000ft Range Beep Vibration Shock Training Mode, Pet Trainer E-Collars Small Medium Large Dogs. works good. My dog picked up on it very quickly with just the tone. easy to use and understand. https://www.amazon.com/AKKEE-Rechargeable-Adjustable-Vibration-Waterproof/dp/B07D9B25BD #Rankboosterreview #akkee #Maryyang