For the money, it is very good. It doesn't reach 800 meters, but it has a good range. The battery is also very good. ♥️

The vibration and sound do not work when there are aggressive behaviors. It is for someone experienced who knows how to apply correction and not for any inexperienced owner. One must know how to use correction properly and not experiment on our dog like some comments I read. The intensity of the current varies for each dog. I do not recommend going above level 8-10. Sometimes it does not make good contact, especially on dogs with long hair, it requires a good tightening. For its price, it is one of the best.

Very good tool for those who intend to deal with their dogs so that they can leave them a little free. It is of good quality construction and really does what it says. It has 3 channels and the battery lasts a long time, as with one charge I can walk the dogs for a week and it still hasn't run out. It is important the white light that you see the dog in the dark also has a green flashing LED. I highly recommend it.

Exactly what we needed to calm ourselves and the neighborhood. At first, sound and then vibration at 99. And then, just the sound is enough. As for the range, with obstacles, the signal is lost at 150-200 meters. But I don't think it's important to reach 600 meters. If someone wants such range, it would be good not to look at a collar that costs 25-30€.

Until now, it is an excellent product. Especially the controller is small and thin, and the antenna is not at risk of breaking. The receivers are of good quality construction and have a perfect fit. The range is sufficient in an open field, but when there is rough terrain with mountains, ravines, etc., you need to roughly locate where the dog is in order to have "visual" contact with the receiver for it to work. However, for this price, it is a very good purchase.