The JAP300 remote dog training collar is an intuitive system in a compact design for dogs sized 10 pounds and up. This affordable unit has a waterproof collar receiver and a range of 400 meters, allowing your dog to enjoy the wettest situations at a distance of 3 football fields! With the system's 5 levels of shock/vibration and standard tone, it's ideal for reinforcing dog obedience around the house, backyard or lake. Main Features： 1. Collar Size: Able to fit small, medium, large dogs and puppies. 10 lbs or Larger. TPU Collar Size from 6 to 23.5 inches long. 2. Includes two collars, Remote Transmitter can control up to two collars. 3. Uses: Our collars can be used for a variety of purposes. Here are a few examples:Basic Dog Obedience, Hunting, Digging, Aggressive, Barking, Jumping up, and bolting. 4. Battery Type: Rapid 2 Hour Rechargeable Lithium Batteries for Collar Receiver, Remote Transmitter 5. Water Capabilities: Waterproof Collar Receiver 6. Range: Up to 400 Meters 7. Tone/Vibration Options: 5 Levels of Vibration and Standard Tone 8. Stimulation Levels: 5 Levels of Electrostatic Pulse 9. Reduced receiver design to accommodate smaller dogs 10. Quickly switch between collars with dog selector button