DIKOO 9V 1A AC Adapter Power Supply 1M (3ft) Length US Plug for Arduino Uno R3 Direct current ripple is small, the work efficiency is high; Working temperature is low, service life is long;Plug Type:5.5mm x 2.1mm &5.5mm x 2.5mm; Wide input voltage range, symbol global use standard; With short circuit protection, over current, over voltage and other functions; EMC circuit can effectively eliminate the interference of peripheral equipment, at the same time, has its own anti-jamming performance, high reliability.