ZJchao 6V 1A AC Adapter to DC Power Adapter, 5.5/2.1 mm for Vive Precision and Omron Series 5, 7, 10 Blood Pressure Monitors - Universal Charger w/ Long Chord Length Input: 100-240 V AC 50/60 Hz Output: 6 V, 1 A (1000 mA) Cord length: 100 cm (about 3.2 ft.) Plug specification- ID: 2.1 mm, OD: 5.5 mm, center plus Free 1 pcs cable (5.5 x 2.1 mm female to 3.5 x 1.35 male)