Installed have 10Geräte, technically they are ok. They are not intended for German wall outlets, no claws, screw holes do not fit. The instructions are poor. A device has failed what I have complained. I should return it with costs, replacement was rejected German in Chinese. The former firm buying club changed its name to SM-PC, settled issue. The customer is still tricked which now moves me to turn on the Consumer Protection. Mains Leading equipment can not be safely installed. Conclusion: good technical equipment may not be installed properly, customers are treated badly.