Yes, the electronic blood pressure monitor is battery powered and comes with 4 AA batteries so that you are able to use it as soon as you receive it. The professional blood pressure machine also comes with a micro-USB plug that you can use with an AC adapter to power the device. This gives you the flexibility of options for more personal and convenient use. Kindly keep in mind that an AC adapter is not included in the kit, and using both the batteries and the USB plug simultaneously is neither necessary nor advisable.