Sony MD-CASE4 Minidisc Walkman Armband Carry Case (Discontinued by Manufacturer) Armband-style minidisc Walkman carry case Holds 1 minidisc Walkman recorder and 1 extra MD media Provides comfort and functionality for your minidisc Walkman Fits comfortably on either arm Fits minidisc Walkman models: MZ-N420D, MZ-N420DPSGray, MZ-NF520D, MZ-NH600D, MZ-NHF800, MZ-NH900, and MZ-NH1