early no problem. then, the collar off without warning. The service then shows me reactivated manually directly to the collar, handy when the dog runs away to the other end of the pitch. several emails for service and response. Filming when the problem happens to you. uhm uhm practice filming a necklace that is off. Finally I advise against buying because despite all my reminders no good solution I proposed, nor return to the workshop of the VAS.
