The disclosed prosthetic device may comprise a receptacle for receiving a limb of a person； a vacuum pump in fluid communication with the receptacle for maintaining an amount of vacuum used for connecting the receptacle to the limb of the person； a controller； and/or an electronically controllable fluid control device. The controller may be configured to provide a vacuum signature to be displayed at a user interface and/or to control the amount of vacuum used for connecting the receptacle to the limb of the person.
