HDMIHOME 5.5mm x 2.5mm DC 12V Power Jack Charging Cable for Microsoft Surface Pro 3 100cm 5.5mm x 2.5mm DC 12V Power Jack Charging Cable for Microsoft Surface Pro 3 Length: 100cm The power supply not included, you need to connect your DC 12V 2.5A or up power to charge the Surface Pro 3 Tablet. Easy to carry.