I ordered from smartlight.me 10. the price was also with postage 16.72�. in the evening after work I will play with it. thank you for the tip.! So far I haven�t encountered any problems. Everything works great. For being so small it has a perfect signal. It finds the device instantly. home assistant also had no problem integrating this key. the firmware can also be updated via their website. I am satisfied. (source: https://community.home-assistant.io/t/smlight-slzb-07-zigbee-coordinator-usb-dongle-based-on-silicon-labs-efr32mg21-20dbm-radio-soc-mcu-9-98-launch-promotional-price-shipping-otherwise-14-99/625431/36)