Please note on one of the duo minidocs it has a broken release lever. Also the charger has a broken post where you wrap the cord around. The Macintosh PowerBook Duo 230 W/ Minidock Duo M7780 is a vintage Apple notebook that comes with an extra Minidock Duo M7780 for added functionality. This rare find is ideal for collectors of vintage computing equipment or those looking to experience retro technology. With its tested and working status, this product offers a unique opportunity to own a piece of computing history from the iconic Apple Macintosh brand.