The difference between the Bluetens Classic 2, Master and Standard devices lies in their functions and areas of application. Here are the main differences:

- Number of programmes: The Bluetens Classic 2 offers over 100 programmes for different areas of the body, while the Master may have an extended variety of programmes tailored to specific needs.

- App functions: All devices are app-driven, however the Master could offer additional functions or an improved user interface to optimise the user experience.

- Power supply: The Classic 2 has improved battery life compared to older models, which may vary with the other devices.

- Target audience: The Standard may be designed for general use, while the Master may be designed for more intensive applications or specific therapeutic purposes.

- Design and portability: Differences in design can affect ease of use and portability, with newer models often being more compact and user-friendly.

These differences can be critical depending on individual needs and applications.