Yosoo 3V 1A AC Adapter to dc Power Adapter 5.5/2.1mm Input: 100-240 V AC 50/60 Hz Output: 3V, 1A (1000 mA) Cord Length: 100 cm (about 3.2 ft) Plug specificationID: 2.1 mm; OD: 5.5 mm;Center+ Great adapter keeps you from replacing the stupid batteries every week.