What sets them apart are additional features. Examples include more brushing modes, in-handle display and ‘smart’ (Bluetooth) technology. These are nice-to-have, but not critical. SMART MODES to personalise your brushing: Daily Clean, Sensitive, Gum Care, Intense Clean, Whitening, Super Sensitive In terms of quality and efficiency, is it similar ? What are the major differences ? Is it a big difference of price for the heads ? Reply The iO6 is the best value option. It strikes the balance between additional features and price. It has some smart features, but not the full suite.

The iO5 comes with a travel case and a refill holder that holds and protects 2 brush heads. The iO4 does not come with this. Models that connect via Bluetooth to an app will report the active mode within the on-screen timer. Assuming you want something a bit more capable, then the iO6 represents the best value option. It has many of the most desirable features of the iO range, including the in-handle display. But, it remains relatively affordable and you get the best of both worlds, so to speak. INTERACTIVE COLOUR DISPLAY signals vital information: including brushing modes and head replacement reminder, greets you as you power up & gives you a smile for a job well done The iO Series first launched in 2020, with the Series 7, 8 and 9. It has since evolved from 3 to 8 brushes.

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Those with displays show a battery icon and a percentage of the remaining charge after each brushing session. If you bought them at the same price, then I would probably go for the iO Series 7. It is the sleeker unit overall.

If you buy the iO7 in the USA, the power adapter you get with the brush supports 110-130v and has a 2 pin US power adapter. You will need to source a voltage adapter and plug adapter to use this in Europe. Having handled & tested hundreds of products there really is very little he does not know about them.Analogue outputs (options: voltage (0-10V), current (0-20mA) and PWM (5V, adjustable frequency 200Hz-2,4kHz)) I think it is all based around the logic (I might be wrong) that by seeing the on-screen visual and having to actively think about it a bit more, you do a better job of cleaning. INTERACTIVE COLOUR DISPLAY signals vital information: including brushing modes and head replacement reminder, greets you as you power up & givesyou a smile for a job well done