This housing for a WIFI or Bluetooth controlled railaisboard fits inside a 60mm standard in-wall-socket. The Relaisboard is a DIY project available here: http://shop.in-circuit.de/product_info.php?cPath=22_48&products_id=167. With this controller board and WIFI module , I built up my own browser based blinds control. The WIFI module I used combines an Arduino Micro and a WIFI chip (also available at: http://shop.in-circuit.de/), so its programmable with the Arduino IDE. I set up a webserver running on the WIFI module in order to controll the two relais with my smartphone.
I printed the case with 0.4mm and the cover plate with 0.2mm layer height and 0.5mm Nozzle at 1500mm/min without support.