Dog GPS Tracker Collar | No Monthly Fees

It came with a battery but it was dead. I changed it. It beeped and started "ticking", a minute later is started beeping too. I was unable to add it as a device in the app. It never finds anything. Also it's unclear what app can be used. The qr code in the manual leads to iSearching which is a more or less visibly functional app, but the description tells you to download iFindU which is not even fitting the screen. The add device button is under the clock in the left upper corner. The iFindU app tries giving you insteuctions how to use this thing, bit they are not very accurate. There is no button you should press at all. It says when it beeps one it's turned on but even that is incorrect, because it beeps twice. Not worth it...

It fell off and my dog chewed it