An electronic device comprising: a housing comprising: a sidewall defining an opening and a housing hole ; a tray retainer and a tray ejector comprising: a base coupled to a portion of the housing by a pivot ; and an extension arm extending from the base in a first direction and coupled to a user contact plate , the extension arm extending from the base in a second direction and coupled to a tray contact plate ; and a removable tray receivable in the opening and comprising: a body configured to accommodate an electrical card within a thickness of the body; a module holder in a first surface of the body for holding the electrical card; and an external end having a tray hole extending through the external end ; wherein, when the body is fully inserted into the opening : the electrical card communicates with a circuit board of the electronic device; and the housing hole is aligned with the tray hole to receive an instrument for actuating the tray ejector . a housing comprising: a sidewall defining an opening and a housing hole ; a tray retainer and a tray ejector comprising: a base coupled to a portion of the housing by a pivot ; and an extension arm extending from the base in a first direction and coupled to a user contact plate , the extension arm extending from the base in a second direction and coupled to a tray contact plate ; and a sidewall defining an opening and a housing hole ; a tray retainer and a tray ejector comprising: a base coupled to a portion of the housing by a pivot ; and an extension arm extending from the base in a first direction and coupled to a user contact plate , the extension arm extending from the base in a second direction and coupled to a tray contact plate ; and a base coupled to a portion of the housing by a pivot ; and an extension arm extending from the base in a first direction and coupled to a user contact plate , the extension arm extending from the base in a second direction and coupled to a tray contact plate ; and a removable tray receivable in the opening and comprising: a body configured to accommodate an electrical card within a thickness of the body; a module holder in a first surface of the body for holding the electrical card; and an external end having a tray hole extending through the external end ; wherein, when the body is fully inserted into the opening : the electrical card communicates with a circuit board of the electronic device; and the housing hole is aligned with the tray hole to receive an instrument for actuating the tray ejector . a body configured to accommodate an electrical card within a thickness of the body; a module holder in a first surface of the body for holding the electrical card; and an external end having a tray hole extending through the external end ; wherein, when the body is fully inserted into the opening : the electrical card communicates with a circuit board of the electronic device; and the housing hole is aligned with the tray hole to receive an instrument for actuating the tray ejector . the electrical card communicates with a circuit board of the electronic device; and the housing hole is aligned with the tray hole to receive an instrument for actuating the tray ejector . <EOS>