We designed 3 Humane Training Modes: Beep, Vibration (1-16 levels) and Static Shock (1-16 levels). The remote comes with security keypad lock, it can avoid pressing e-shock mode by accident. Novel Magnetic Charging, 2-hour fully fast charging. The dog receiver can last up to 35 days of standby time and the remote can last up to 45 days of standby time.?Note?Do not use an adapter with a power greater than 5V1A for charging. The receive is IP67 Waterproof, it still work even when the dog swimming, raining or snowing, also can bathing freely, the remote control is not waterproof. The control range up to 2400Ft, you can enjoy the training time with your dog in open space, such as backyard, park or anywhere else without restriction. The durable nylon strap has a length of 28 inches, suitable for Most All Sizes of Dogs, removable cleaning, it fits for medium / large dogs ( dog's weight is Perfect for 20 lbs or above). Kindly Reminding: Heaflex remote shock collar is designed for building a better internal communication between your dogs and you, not for punishing the dogs. Please treat animals in a friendly way! The dog training remote control with a lanyard design, it is convenient to carry out without fear of loss, also it is mini size and lightweight, so it can be put in a pocket.