Oral B Wireless Smart Guide Display / Timer Type 3742

The Smart Guide display units were supplied with various models of Oral-B electric toothbrush and allow the user to keep track of their brushing progress throughout each brushing session. Two main models of Smart Guide exist, the squarer Type 3741 and the more rounded Type 3742. Each type has several variants and offers compatibility with different models of toothbrush.

Type 3742

The Type 3742 Smart Guide from Oral-B is the newer model and comes in at least 2 different versions. Unfortunately the different versions are not interoperable so if you are looking for a replacement Smart Guide to work with your electric toothbrush use our guide below to determine which version of 3742 Smart Guide you have. Available in white and silver, this Smart Guide is powered by two AAA size batteries and we recommend that only Alkaline batteries are used, not zinc ones.

Version A

Version A of the Type 3742 Smart Guide has a letter A at the end of the string of numbers marked inside the battery compartment on the ridge between the two batteries. This version was supplied with Oral-B toothbrushes marked with Type 3762 on the bottom of the handle.

Version B / Version 2.1

Version B of the Type 3742 Smart Guide has a letter B at the end of the string of numbers marked inside the battery compartment on the ridge between the two batteries.

Only available in white, version B of the 3742 is also known as the 2.1 version and will work with the Genius/Smart range of toothbrushes marked with Type 3765 on the toothbrush handle. You might need to enable the Smart Guide functionality on the toothbrush itself via the smartphone app before the brush will synchronize with the Smart Guide.

The Smart Guide is a separate LCD unit powered by two AAA batteries (included in the box).

At a glance the Smart Guide communicates which brushing mode you are using, when the time comes to brush a different section of your mouth as well as if you are brushing too hard.

An adhesive ring allows you to mount the smart guide to the wall of your bathroom keeping it within an easy view.

After two minutes of brushing a smiley face appears on the screen. If user stop brushing earlier they are awarded with a star rating (out of five) on the screen. The star rating turned teeth brushing into somewhat of a competition, with user aiming to get as many stars as possible.

When you are not brushing your teeth, the Smart Guide displays the current time as well as the star rating of your last brushing session.

It is also worth mentioning that the Smart Guide is basically the only reliable way to determine which brushing mode you are using. If you are someone who makes use of the different brushing modes then you may find yourself relying on it.

Synchronizing your Smart Guide with your Toothbrush (Pairing)

Please note that you might need to ‘pair’ or synchronize your new SmartGuide with your toothbrush when it arrives.

Note : Your Smart Guide can be synchronized (also called pairing or programming) to work with one or two Braun Oral-B toothbrushes at the same time, as long as both these brushes are of the same Type number.

Setup & Clock

To power up your SmartGuide slide open the battery cover on the back and insert two fresh Alkaline batteries (AAA size for the Type 3742 SmartGuide). The clock display should start flashing ’12:00′.

Press and hold the ‘set’ button inside the battery compartment until ’12h’ is flashing in the display. This means that time will be displayed in the 12-hour format. If you would prefer 24-hour time format press the  ‘h/min’ button once so that ’24h’ is displayed. Press ‘set’ to save the setting.

The hours digits should now be flashing. Keep pressing the ‘h/min’ button until the correct hour is showing and press ‘set’ to save the setting.

The minutes digits should now be flashing. Keep pressing the ‘h/min’ button until the correct minute is showing and press ‘set’ to save the setting.


  • Open the battery compartment of your Smart Guide and hold down the ‘h/min’ button for 3 seconds until the display starts flashing ‘L ‐ ‐ ‐’
  • Switch on your toothbrush for a few seconds until the SmartGuide displays ‘L ‐ 1 ‐’
  • Switch off your toothbrush
  • If you have a second matching toothbrush to pair with the SmartGuide switch it on now and let it run for a few seconds until the SmartGuide displays ‘Full’
  • You can exit the pairing process by pressing either button inside the battery compartment.

Some toothbrushes have the facility to turn off radio transmission so if this has been used the toothbrush will be unable to pair with the Smart Guide.

Compatible Brush handle models

The following Oral-B models are compatible with this SmartGuide

Fits type 3764 3754 3756 3765:

802821893765# Oral-B Genius White 8000N – Bluetooth with smartphone holder
802822763765# Oral-B Genius White 8000 TriZone – Bluetooth
802822783765Oral-B Genius White 9000N – Bluetooth with smartphone holder
802822963765Oral-B Genius Black 9000N – Bluetooth with smartphone holder
802823333765Oral-B Genius 8900 Duopack, silver
802823343765# Oral-B Genius White 8200 – Bluetooth with smartphone holder
802844053765Oral-B Genius White 8000S – Bluetooth with smartphone holder
802844103765Oral-B Genius White 9000S – Bluetooth with smartphone holder
802868253765# Oral-B Genius Black 9000S – Bluetooth with smartphone holder
802965883765Oral-B Genius 9000N Rose Gold – Bluetooth
802966073765# Oral-B Genius 9000S Rose Gold – Bluetooth
802976523765Oral-B Genius White 8200W – Bluetooth with smartphone holder
802977063765# Oral-B Genius White 8100S – Bluetooth with smartphone holder
802977163765Oral-B Genius White 9100S – Bluetooth with smartphone holder
802977203765Oral-B Genius Black 9100S – Bluetooth with smartphone holder
802977213765Oral-B Genius White 9200W – Bluetooth with smartphone holder
802977223765# Oral-B Genius Black 9200W – Bluetooth with smartphone holder
803011073765# Oral-B SMART 6 – 6000N – Bluetooth, white / blue
803011133765Oral-B SMART 6 – 6100S – Bluetooth, white / blue
803011143765# Oral-B SMART 6 – 6000W – Bluetooth, white / blue
803140493765Oral-B Genius 10100S White – Bluetooth
803141033765# Oral-B Genius 10100S Black – Bluetooth
803141283765Oral-B Genius 10100S rose gold – Bluetooth
803141363765# Oral-B Genius White 8100S – Bluetooth
803150033765Oral-B SMART Expert + travel case, blue / white
803158873765# Oral-B Genius 10100S Orchid Purple – Bluetooth
803235833765# Oral-B Genius 10100S Black Edition
803252063765Oral-B Genius 10000N White
803252093765Oral-B Genius 10200W White / black
803261793765Oral-B Genius 10100S White
803262363765Oral-B Genius 8000N Silver
803262553765Oral-B Genius 8200W Silver
803262743765Oral-B Genius 10100S Black – Bluetooth
803262763765Oral-B Genius 10000N Orchid Purple
803262773765Oral-B Genius 10100S Orchid Purple / white
803262783765Oral-B Genius 10200W Orchid Purple
803291343765Oral-B Genius 9900 Duopack, black / rose gold
803291353765Oral-B Genius 10900 duo pack, black / rose gold
803291363765Oral-B Genius X 29000 Duopack, black / rose gold
803292683765Oral-B Smart Expert Duopack / blue
815752063765Oral-B Genius Stiftung Warentest Duo-Pack, rose gold / black
816368073765# Oral-B folk toothbrush Genius – Bluetooth with smartphone holder
816725353765Oral-B SMART Stiftung Warentest Duo-Pack, white
816752063765# Oral-B Genius Stiftung Warentest Duo-Pack, rose gold / black
816850343765# Oral-B Genius 10100S rose gold – Bluetooth
816970343765Oral-B Genius 10000N Design Edition including Braun Premium travel alarm clock
816970353765Oral-B Genius 10900N Design Edition incl.Brown Premium Travel Alarm Clock
817179433765Oral-B GeniusX Luxe Edition Antracite Gray gift pack, black / gray
817180433765Oral-B GeniusX Luxe Edition rose gold gift pack, rose gold
802480323764Oral-B PRO 6000 SmartSeries – Bluetooth, white D36.545.5X_
802480593764# Oral-B PRO 7000 SmartSeries Black – Bluetooth, D36.555.6X_
802480603764Oral-B PRO 7000 SmartSeries White – Bluetooth / D36.555.6X
802480613764Oral-B TriZone 7000 SmartSeries White – Bluetooth D36.555.6
802500063764Oral-B TriZone 6000 SmartSeries – Bluetooth, white D36.545.5
802500073764Oral-B TriZone 7000 SmartSeries Black – Bluetooth
802509073764Oral-B PRO 6200 with free SmartGuide Edition, D36.545.5X_ws
802509113764Oral-B TriZone 6500 with 2nd handpiece D36.545.5HX, wh.
802509183764Oral-B PRO 6500 with 2nd handpiece Lim.Edition D36.545.5HX, wh
802509373764Oral-B TriZone 6200 with free SmartGuide LE D36.545.5X_ws.
802629953764Oral-B PRO 6000 SmartSeries WOW-Edition, white, D36.545.5X_
802823673764Oral-B Smart Series 5000 – Bluetooth with smartphone holder
815748683764Oral-B PRO 6500 + free handpiece – limited edition, white
816045703764# Oral-B PRO 6400 SmartSeries STIWA – Bluetooth, white
637577003762Braun Oral-B Triumph 5000 with Wireless SmartGuide ** Edition **
802089883762Brown D34.545.5 SG
802090853762Oral-B TriZone 5000 with SmartGuide D34.545.5X
802094563762Brown D34.565.5X
802099723762Oral-B Triumph 5000 pink with free SmartGuide / D34.545.pink
802099803762Braun Oral-B Triumph 5000 + 2nd toothbrush – D34.545.5H pink
802099843762Braun Oral-B TriZone 5000 + 2. Toothbrush – Limited Design Editi
802100003762Braun Oral-B TriZone 5000 green with free SmartGuide
802282253762Oral-B TriZone 5500 with SmartGuide D34.545.5X, silver / white
802282263762Oral-B Triumph 5500 with SmartGuide D34.545.5X, silver / white
802286423762Oral-B Professional Care Black 7000 with SmartGuide
802286523762Oral-B Triumph 5500 with free SmartGuide onpack
802286533762Oral-B TriZone 5500 with free SmartGuide onpack
802286543762Brown D34.545.5H green, trizone
802286563762Brown D34.545.5H
802350783762Oral-B TriZone Black 7000 with SmartGuide
813250053762Braun Oral-B Triumph 5000 with free SmartGuide OLYMPIA
813250073762Braun Oral-B Triumph 5000 with SmartGuide + 2nd handpiece
813602533762Braun Oral-B TriZone 5000 with SmartGuide
814579583762Oral-B Triumph 5500 with 2nd handpiece
814579593762Oral-B TriZone 5500 with 2nd handpiece
814613033762Oral-B Professional TriZone 5500 + free Stage Power CLS
814613073762Oral-B Professional Triumph 5500 + free Stage Power CLS
848523783762Brown D34.545.5H
848523793762Braun toothbrush D34.545.5
848523823762Braun ORAL-B TRIUMPH 5000 PROF. WHITE BOX – D34
848523833762Brown D34.565.5X
848523863762Oral-B Triumph 5000 with SmartGuide D34.545.5X
848599273762Oral-B TriZone 5000 with SmartGuide D34.555.5X
Z802094653762White-Box Oral-B TriZone 5000 with SmartGuide Edition
Z848523823762White-Box Oral-B Triumph 5500 with SmartGuide fZPraxen
802480253754Oral-B PRO 5000 with SmartGuide, dark blue / white
802500053754Oral-B TriZone 5000 toothbrush with SmartGuide, light green / white
802714393754Oral-B PRO 5000 Bluetooth, dark blue / white
802806573754# Oral-B PRO 5000 Sensitive with Bluetooth, dark blue / white
802806583754Oral-B PRO 5000 3D White with Bluetooth, dark blue / white
802823823754# Oral-B Smart Series 4000 3D White – Bluetooth
802824113754# Oral-B Smart Series 4000 Sensitive – Bluetooth
802824173754# Oral-B Smart Series 4000 CrossAction – Bluetooth
802867753754# Oral-B PRO 4900 Black with 2nd handpiece – limited editing
802994703754# Oral-B SMART 4900 with 2nd handpiece – limited edition
815377493754Oral-B PRO 5000 Smart Series Federal Brush – Bluetooth
637387103738** Braun Oral-B Triumph with SmartGuide D30.546.4X
637387123738** Braun Prof. Care 9900 D30.546.4 X, timer smart
637387313738** Brown D30.546.4 + D 30.500 X, timer
637387323738Brown ** D30.546.4 X, timer smart
637707103738** Braun Oral-B Triumph 5000 SmartGuide, D32.564.5X
637707133738** Braun Oral-B Triumph 5000 m. free SmartGuide (StiWa VERY GOOD)
637707403738** Braun Oral-B Triumph 5000 with SmartGuide + 2nd toothbrush