Amzdeal&reg; 4 in 1 Pet Training Collar Remote Control Electric Shock Vibrate LCD Dog Anti-bark Training Collar US This item is an advanced dog trainer which has complete functions. It can receive signal within a rated range of 1000 meters. Dog training collars help teach all the basics: sit , stay, and heel. Instead of pulling and dragging your dog down a street filled with temptation and distractions, employ a unit to silently and easily correct his behavior. This actual a very effective electronic dog training system. Remote controller has power-saving feature. Power will be turned off automatically if you don't use it for a long time. Both Receiver and Remote Control are built-in rechargeable lithium battery 7 degrees shock and 3 degrees sounds, Approx 1000 meters remote distance