Overview: 1. The pet electronic fence is invisible and does not need to occupy the position of the pet dog electronic fence. With magnetic field induction technology, you can set your dog anywhere within one square kilometer (this range can be adjusted), and it can also effectively ensure that your dog cannot walk out of this square kilometer at will 2. The pet electronic fence, the transmitter is equipped with a sensitivity adjustment device, which can arbitrarily adjust the range of the area that the pet dog cannot approach. The receiver acting on the dog?s neck has a variety of sound prompts. This sound changes from short to faster, which clearly and effectively tells your dog which areas are inaccessible. If your dog does not hear this warning, it is still close to the inaccessible area you set. The receiver on the dog's neck will give it a short electric shock until it turns and leaves. Repeat a few times and your dog will understand: When it hears the warning sound, the area in front of it cannot be approached. In this way, an invisible and effective fence is formed relative to your pet dog Feature: 1. The receiver can be charged for 500 hours at a time, and it only takes 3 hours to fully charge 2. The receiver has 5 levels of adjustable, level 1 without electric shock, there is an alarm sound, level 2-5 can be adjusted at any time, the electric shock gradually increases, the alarm sound increases at the same time, the purpose is more suitable for all kinds of dogs 3. The receiver is compatible with 4 products: 023 026 227 227B. The user initially chose these 4 products. If the user wants to select the S-228 receiver first, there is no need to change the host transmitter and arrange the coils and other troublesome locks, and it can be done directly. use. 4. The receiver adopts a waterproof design, which can be deeply waterproof, so there is no problem in soaking in water. Waterproof grade is IP4 5.300m 1.00mm coil 6. Launched to support 1.00mm 1.6mm coils, which is different from other products on the market 7. The receiver has a switch function, which can save power and eliminate interference. This is a major improvement different from other receivers. Packing list: As you choose