This sphygmomanometer also has the function of heart rate

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Key Power 230-Watt Step Down 220V to 110V Voltage Converter & International Travel Adapter/Power Converter with USB-C Port 18W - [Use for USA Appliance Overseas in Europe, AU, UK, Ireland, etc.] Wrinkle & Anti-Aging Devices This sphygmomanometer also has theBrand: Key Power Features: Worldwide Use: It equipped 5 different sockets for (UK, US, AU, IN, EU); voltage converts 220 240V to 110 120V so you could use American electronics in Antigua & Barbuda, Aruba, Bulgaria, Cambodia, Canada, China, Costa Rica, Dubai, England, Fiji, Germany, Guam, Haiti, Hong Kong, Ireland, Japan, North Korea, South Korea, Malaysia, New Zealand, Peru, Puerto Rico, Singapore, Turkey, United Kingdom and more. Patented Product