This is a case for the cap-meter by JYE-Tech.  informations:http://www.jyetech.com/Products/CapMeter/e060.php  where to buy the DIY-kit in Germany?http://www.watterott.com/de/Kapazitaetsmessgeraet-Bausatzthe circuit board is mounted with two screws, the other two screws fix the top to the bottom.