Dog Training Collar with 2 Receivers - This collar is perfect for those with two dogs. You can control the collars separately or together. If you want to control the collars separately, you will need to assign each collar to a channel. And if you want to control both at the same time, assign them to the same channel. Designed for long and thick hair, and with memory settings - If the dog’s hair is too long or too thick, the contact points may not touch the skin of the animal. These two metal contact pieces are mounted on the receiver to obtain a good result in dressing. 3 memory buttons for vibration and static shock: A, B, AB. Train different dogs or different movements without adjusting the remote control. 3 Effective Training Modes - This training collar has 3 modes: sound, vibration (1-8), and static shock (1-16). This is the best way to teach your pet good behavior and protect it. This collar will stop your dog from biting furniture, stealing your clothes, and other bad behavior.