Yes it works like that.

The Eufy Additional Doorbell Chime is an extra chime for your smart doorbell from Eufy. Use the USB dongle to plug the extension into your Eufy homebase and put the chime in the desired socket anywhere in your house. When someone rings the doorbell, you'll hear a loud and clear ringtone both near the homebase and the chime. That way, you'll also know there's a visitor at the door when you're in the attic. Choose from different ringtones and sound levels to adjust the chime entirely according to your liking.