AMAZING ELECTRIC DOG FENCE: Electric dog fence: the transmitter, receiver and boundary lines form an effective electronic fence system that can stop our dogs from designated areas, thus greatly ensuring the safety of our pets. If your dog tends to wander from range, the transmitter will emit a harmless radio signal. Once the receiver detects a signal, it will automatically initiate a beep or vibration pattern to urge the dog back within the boundary line NO MORE DIGGING UNDER THE FENCE TO ESCAPE: The wireless dog fence collar leash is made of TPU, 28.3 inches long, and equipped with a total of 34 holes to fit your dog's neck properly. Suitable for dogs of all sizes. The transmitter comes with a 1.2-acre signal field range and 100 adjustable levels. The remote control distance can be increased by 0.5m/1.6 feet every 10 levels. Broken wire warning can tell you in time if the wire is damaged VERY EFFECTIVE: One transmitter can be paired with multiple receivers. With a 300mAh built-in rechargeable battery, our receiver lasts approximately 2 days on a full charge. If the red light flashes quickly, it means the receiver needs to be charged. In addition, our dog electric fence receiver is made of durable ABS material and has IPX7 waterproof level, which greatly extends its service life and allows your dog to play in wet grass or rainy weather