The Official Raspberry AC adapter has a USB port to operate a Raspberry Pi with it. It provides stable 2.5 A at 5.1 V output voltage and has sufficient reserves to cushion and voltage spikes. Delivery is included 1.5m Micro-USB cable. There are also four interchangeable power adapter - so you can use the power supply in the UK, Europe, Australia and the USA. The power supply uses the improved power management on the Raspberry Pi 3 optimal. It is compatible with all Raspberry Pi models, however