For use in training your dog out of any type of bad behavior. This Training collar is very popular with dog trainers and pet owners. Its training system will help you to control and train your dog in effective range by a series of functions, including vibration alert, sound warning, mild static correction. With its remote design it will assist significantly in dog training behavior. We can supply this system in options also of two and three dog all worked from one remote as above The customer reviews below speak for themselves Fully water resistant design to IP66 We include a free Apple Air tag holder which will assist you in tracking your dog also on your phone Adjustable levels: levels of vibration and mild static correction are adjustable from 1 to 99, and you are advised to try levels gradually to find the proper one when using this pet training system, You should always use the minimum possible settings 3 training modes: sound / vibration / mild static correction With blue back-light screen: can be used at night Long-distance remote control: the remote distance is 800m (without any disturbance) 3 channels: there are 3 signal channels on the remote transmitter, and it can control 3 receivers of the same model Auto power save: automatic standby mode and memory functionsAdjustable collar size: the max adjustable length is up to 67cm, suitable for all size dogs We can make the system up for you in a two and three dog option where you would have one remote and either two or three collars working from the one remote, please email us for details Avoid leaving the collar on the dog for longer than necessary; training time frames should be no longer than 2 hours and it can be removed after that If possible, reposition the collar on the pet's neck every second day or training period When using the static correction mode, start from the LOW LEVEL and look at your dog's reaction, only use the minimum correction necessary. Make sure the collar is not to tight, two fingers must fit between the collar belt and your dog's neck. Examine daily the neck area of your dog before and after training