Description 1 --- Pet electronic fence is an invisible, do not have to occupy the place of the pet dog electronic fence. Through the magnetic field induction technology, you can set your dog in a square kilometer range (this range is adjustable) of any place can not approach the area, but also can effectively ensure that your dog can not randomly out of the square kilometer range.2 --- Pet electronic fence, the transmitter has a sensitivity adjustment device, you can arbitrarily adjust the size of the range you set can not let your dog close to the area. If your dog does not listen to the sound warning, still close to the area you set can not approach, then the receiver set on your dogs neck will briefly shock it, until it turns back to leave. After a few cycles of this, your dog will understand that when he hears the warning sound, the area in front of him is not accessible. Thus, an invisible and effective fence relative to your dog is formed.Product features.1. Receiver charge once available 500 hours, fully charged only 3 hours2. The receiver has 5 gears adjustable, 1 gear without electric shock, with alarm sound, 2 gears -5 gears can be adjusted at any time the size of the gear electric shock gradually enhanced and alarm sound increased at the same time, the purpose is more suitable for a variety of dogsThe receiver is compatible with four products: 023 026 227 227B, the user originally selected these four products, if the user wants to first choose S-228 receiver, do not need to change the host transmitter and layout of the coil and other annoying lock work, you can use directly.4. Receiver waterproof design, can be deeply waterproof, soaking water are no problem, waterproof level IP45.300m 1.00mm coil6. Launch can bear 1.00mm 1.6mm coil, there is a difference between the other products on the market7. Receiver with switch function, can save electricity and eliminate interference, which is a major improvement from other receivers.