just under 10 euros are at least 8 euros too much ...

The variety of collars offered suggests that there must be a mass product.
The luminous dog collar did not particularly long.
On the one hand there was fast switching errors in the electronics, so that the LED could no longer be off (presumably by invading Feutigkeit). On the other hand, the band split at the buckle
So technically and mechanically only briefly durable.
The next band I'll pay willy-nilly, a higher price. Who buys cheap, buys twice.