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This case is designed to hold a phone and the Platinum G4/G5 Dexcom Receiver within a single case. The phone is attached to one side and the Dexcom receiver is attached to the other side. The side with the Dexcom receiver case includes a wall on the left and right side so that a USB OTG cable can be stabilized when plugged into the Dexcom USB port. We recommend a USB OTG cable which will fit properly within this wall. This was created by a T1 diabetic for the Nightscout project. We recommend that sticky Velcro tape be used to hold a USB OTG cable in place between the phone and Dexcom receiver. Thanks to Mads_ring for providing the Dexcom case design. If you have a problem with this case for any reason, please contact the designer within the Shapeways messaging system. We will do everything we can to resolve any problems quickly. I AM NOT OFFERING COLORED CASES BECAUSE THEY ARE MORE BRITTLE THAN WHITE AND HAVE REPORTED BREAKAGES.. I apologize for the inconvenience.