FrSky FLVSS is a voltage sensor intended to relay battery information over a SmartPort connection. However the bright OLED display and small size makes it a perfect tool to carry and check you lipo voltage. This case is designed to better protect the FLVSS when carried around the field, yet still be very minimal, not much larger than the PCB itself. In order to keep the size down I removed the original foil covering as well as the unused pins for the smart port and LED. The case should fit without these modifications, but the cover cannot be used. [Update] Added version of the case with a small notch to indicate which pin is ground. (FLVSS_case_ground_notch.stl) Shows up best when printed in light colored filaments, as the connector behind the notch is black.