The Mudita Bell and Bell 2 do not feature any wireless technology and are suitable for EMF-sensitive users.
Self-Sufficient Device
The Bell and Bell 2 have simple designs that does not require them to communicate with any other devices. As such, they don't feature Bluetooth, WiFi, or any other form of wireless communication. The only time the clocks are connected to anything is when they're plugged into a charger.
All electronic devices naturally emit weak electric fields and the Bell and Bell 2 are no exception to this. However, this field is so small that it's negligible.
