Amazon.com: Accessory USA AC DC Adapter for Omron M6 Comfort Automatic Arm Blood Pressure Monitor HEM-7321 HEM-7321-E HEM-7131-Z HEM-7211 Power Supply Battery Charger : Electronics
6V 0.7A 700MA AC DC Power Supply Adapter Charger For OMRON Blood Pressure Monitor HEM-741 HEM-7121 HEM-7130 HEM-712 HEM-7122 - AliExpress