The Ferrofish Power Supply Unit, GB for B4000+ is an external power supply for the B4000+ system. It accepts a wide-range input of 100 to 240 V and provides an output of 12 V at 0.6 A. The unit measures 5 cm in width, 15 cm in length and 8 cm in height, with a weight of 0.2 kg. The manufacturer article number is PSU-GB-B4000.