Holdding 3V 1A AC Adapter to DC Power Adapter 5.5/2.1mm/ DC Power Adapter with Extra One Conversion Line For Free Input: 100-240V 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+ free 1pcs cable(5.5*2.1mm Female to 3.5*1.35 Male)