Estes Proto-X And Hubsan Q4 Storage Plus Charging Case
This case has 3 openings in the back for charging Estes Proto-x and Hubsan Q4 Nano Quadcopters. Simply slide the drawer to the back of the case and this will charge the quadcopters.
You may need to affix a small piece of tape to the charging plug before inserting the charging plug into the back of the case to allow a tight fit.