Brand new, boxed, Apple original DVI to ADC monitor adapter which allows Apple monitors featuring their proprietary ADC connector to be connected to any computer with a standard DVI port. The adapter is mains powered and also connects to the host computer's USB port. The image signal, power and USB are then all passed to the monitor via the ADC connector.
Please note: This is a new Apple service spare and does not include the clover-leaf mains lead.