The Ferrofish PSU, EU for B4000+ is an external power supply intended for use with the B4000+ unit. It accepts a wide-range input voltage of 100–240 V and provides a 12 V DC output with a maximum current of 0.6 A. The power supply weighs 0.2 kg and measures 5 × 15 × 8 cm. The exact input and output connector types are not specified by the manufacturer.