The build quality is good, you can calibrate'm also with the originals Joytech products.
BUT:
The Spinner (controller to the battery ground), disguises himself every time, like me, just put it in my pocket.
Since the K PT II + Spinner now makes my everyday whistle on the go, that's certainly very annoying because it can kokeln times, or simply due to a lack of power just is not evaporated.
Remedied by a Tesa strip which then fixed the Volt setting.
But the intention is not that.
If the rotation-resistance would be higher, the battery would be perfect, so it was enough just to 3 ***.
