A display unit includes a number of connectors for attaching and powering electrically powered devices, such as illuminated jewelry items, each including a battery and an end cap which is removed when the item is placed on the display connector. Each of the connectors includes a threaded mounting surface engaging a threaded mounting surface of one of the devices. The orientation of each device is adjusted by its rotation in engagement with the connector as a resiliently mounted electrical contact surface of the connector is held in contact with a contact surface of the device so that electrical power is retained within the device.