E3 - User Guide - First-time setup

Congratulations on receiving your new pair of E3! Use this guide to learn about pairing E3 with your preferred device, charging the batteries, and restoring the earphones to their factory settings. 

What's included in the box

  • E3 wireless earphones and charging case
  • Interchangeable ear tips in five different sizes: XS, S, M & L &
  • Type-C USB-cable
  • Microfiber cloth
  • Owners manual

Before getting started

⚠️  Sudio E3 is delivered with a red protective film covering the charging connectors between the earbuds and charging case. The film needs to be removed in order for the earbuds to power on.

The earbuds will likely have some existing battery charge, however it is recommended to fully charge E3 before using it for the first time.  

Turning E3 on or off

E3 powers up as soon as the lid on the charging case is opened, as indicated by the LED lights on the earbuds and the audio feedback 🔈 On.

Similarly, E3 is turned off when placing the earbuds back into the case. 

You can also use the touch controls to power the earbuds on or off. Do this by holding the touch control for 5 seconds on either earbud. 

Pairing with a device

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E3 enters pairing mode when opening the lid on the charging case. Open the Bluetooth settings on your device and wait for E3 and the device to locate each other, then select Sudio E3 when it appears in the list. You will hear 🔈 Connected, confirming that the devices are paired with each other!

Charging the batteries

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There are three batteries in total on E3; one in the charging case and one in each earbud.

The E3 earbuds charge their batteries automatically when placed inside the charging case. Make sure to first remove the protective film which is covering the charging connectors.

The E3 case is charged with a Type-C USB-cable and can also be charged wirelessly. When the case is charging, you will see a light on the front o the charging case. It is recommended to use the Sudio Type-C USB-cable that's included in the package, but the charging case may be compatible with third-party Type-C USB-cables as well.

Restoring E3 to factory settings

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If E3 is behaving unexpectedly or you simply wish to restore it to its original settings, reset it by placing the earbuds inside the case and, with the lid open, press the button on the back of the case for 5 seconds. The reset is complete when the LED light on the front of the case flashes white twice.

You may then proceed with pairing E3 again.

E3 - User guide - Connectivity & Pairing

Sudio E3 enters pairing mode immediately when opening the lid on the charging case. When pairing E3 for the first time, you hear 🔈 On followed by 🔈 Ready to pair, find your Sudio product in the Bluetooth list of your device.

⚠️  Sudio E3 is delivered with a red protective film covering the charging connectors between the earbuds and charging case. The film needs to be removed in order for the earbuds to power on.

Pairing E3 with a device

  1. Remove the E3 earbuds from the charging case and fit them inside your ears.
  2. Go into the Bluetooth settings on your device. The E3 earbud LED lights are flashing white and orange while scanning for available devices. 
    • For iOS (iPhone), go to the Settings app and select Bluetooth.
    • For Android, go to the Settings app, then select Connections followed by Bluetooth.
    • For Windows 10, click on the Start button, select Settings followed by Devices, and then Bluetooth and other devices.
    • For macOS, go to the System Preferences app and select Bluetooth.
  3. Locate and select Sudio E3 in the Bluetooth list on your device.
  4. When paired you will hear the audio feedback 🔈 Connected.

If E3 has previously been paired with your preferred device, simply remove the earbuds from the charging case and they will automatically connect, so long as Bluetooth is activated on the device and E3 has not been paired with a different device more recently. 

Device compatibility

E3 uses Bluetooth version 5.2 which is compatible with a wide range of Bluetooth devices. The paired device does not need to be the same version, but similar versions are more likely to maintain a strong connection. 

Signal interference

Some wireless devices may interfere with each others' signals, such as WiFi-routers, smartwatches, other Bluetooth devices, etc. If they operate within the same frequency, you may experience interference such as dropped sound and glitching. The easiest way to locate the cause of interference is by maintaining one connection between devices at the same time or take your E3 and connected device outdoors to see if the interference clears.

E3 can be up to a maximum of 10 meters (32 ft) from the paired device, but the connection may break if they are blocked by walls or similar objects. 

Pairing with multiple devices

E3 can remember up to 10 devices and will pair automatically with the last used device.

It is possible to keep E3 connected to several devices at the same time, such as a laptop and smartphone simultaneously, E3 supports Multipoint connection. 

You can quickly and easily switch between audio sources with your E3 without having to manually disconnect and pair them to one device at a time. Multipoint helps to simplify the process of connecting, disconnecting, and reconnecting your E3 every time you want to use them with a different device. 

E3 - User guide - Touch controls

E3 has a touch control button on each earbud that allows you to control certain features on your paired device.

Music/video playback

  • Touch once on either earbud (left or right) to play or pause
  • Touch twice on the left earbud to rewind
  • Touch twice on the right earbud to go forward
  • Touch three times on the left earbud to decrease volume
  • Touch three times on the right earbud to increase volume

Incoming phone calls

  • Touch once on either earbud (left or right) to accept a phone call
  • Touch (hold) for two seconds on either earbud (left or right) to reject or end a phone call*

*It's not possible to end a call using the touch controls while using third-party conference software due to different software protocols. 

Active Noise Cancellation and Voice Assistant

  • Touch (hold) for two seconds on the right earbud to cycle between Normal mode and Active Noise Cancellation mode
  • Touch (hold) for two seconds on the left earbud to turn the Voice Assistant on/off


E3 powers on and off automatically when the earbuds are taken out or put back inside the case. However, you can also control this without using the charging case.  

  • Touch (hold) for five seconds on either earbud (left or right) to power on (single earbud).
  • Touch (hold) for five seconds on either earbud to power off (both earbuds). After 2 seconds the listening mode will change, followed by 🔈 Off.

E3 - User guide - Factory reset

If E3 starts behaving unexpectedly, or if you wish to remove the connection between E3 and the connected device, you can perform a factory reset to restore your Sudio E3 to its original settings. This will reset the connection between your paired devices, as well as the connection between the two earbuds.

  1. Place the earbuds back into the charging case and keep the lid open.
  2. Press and hold the reset button on the back of the case for 5 seconds.
  3. The factory reset is complete when the LED light on the front of the case flashes white twice.
  4. Close the lid and allow 1-2 minutes before using the earphones again.

When you hear 🔈 Ready to pair, find your Sudio product in the Bluetooth list of your device, proceed to pair them with your Bluetooth device.

E3 - User guide - Battery levels and management

E3 has three built-in batteries; one inside the charging case and one in each earbud. The battery inside the case is used to charge the earbuds, while the included Type-C USB-cable is used to charge the case.

Before using your E3 for the first time

⚠️  Sudio E3 is delivered with a protective film covering the charging connectors between the earbuds and charging case. The film needs to be removed in order for the earbuds to power on.

Charging and play times

The earbuds can be used for approximately 6 hours on one charge (4.5 hours while using ANC), with up to 30 hours in total before the case needs to be recharged.

Each battery takes approximately 90 minutes to fully charge. 

Charging methods

The E3 case can be charged with a Type-C USB-cable, wireless charging is also supported. We recommend using the Sudio cable included in the package, however, other third-party Type-C USB-cables may be compatible too.

Battery level indicators

The charging case’s indicating light is on the front of the case. The earbuds do not have an indicating light.

The LED on the case lights up when the earbuds connect and disconnect to the case and when there is less than 25% battery remaining.

When inserting the charging cable to the case, the current battery level is displayed for 5 seconds followed by a blinking light, indicating that the case is currently charging. 

In some cases, you can also read the battery level on your phone, such as iPhone or Android devices. The level shown is that of the E3 earbuds, not the charging case.

Charging case (no cable inserted)

  • White: 26-100% battery remaining
  • Orange: 0-25% battery remaining

Charging case (with cable inserted and charging)

  • White (fixed): 100% battery charged
  • Orange/White blinking: 0-99% battery charged

E3 - User guide - Getting the perfect fit

Sudio E3 has gone through extensive research and testing to result in an ergonomic design that provides all-day comfort and is ideal for long listening sessions. 

To fit the earbud inside your ear, place it with the touch button facing outwards and slightly twist it in place.

E3 is delivered with four interchangeable silicone ear tips in sizes XS, S, M and L. The size M ear tips come pre-fitted on the earbuds. If needed, change these to find the size that best fits your ears without compromising comfort.



E3 - User guide - Care and cleaning

Cleaning your earphones on a regular basis will ensure the best possible sound performance and prevent them from wearing out sooner than expected. 

Sudio E3 features silicone ear tips with a built-in mesh net, protecting the earbuds from dirt, grime (and the notorious earwax), all while sitting comfortably in your ears. These ear tips can be removed from the earbuds and cleaned with water or a cotton swab. Avoid hot water though, as this can distort the size and shape of the ear tips.


Use only a slightly damp cloth when cleaning the earbuds and/or case. You can also use a fine brush or cotton swab to gently clean inside the case, avoiding damage to the charging connectors (copper pins). While the E3 earbuds and case are sweat- and splash-proof, subjecting them to high moisture levels could lead to permanent water damage.  

Psst, the Sudio Care Kit is ideal for regular maintenance and includes all the tools you need to keep your Sudio earphones in shape!  

Keep in mind that with time, some discoloration may eventually appear. This is most common if the earbuds or charging case continue to come in contact with dirty surfaces or materials over extended periods of time.

E3 - User guide - Download PDF version
E3 - Features - Active Noise Cancellation (ANC)

E3 features two audio modes that let you decide what you want to hear - and what you don't want to hear. These two modes are called Active Noise Cancellation (ANC) and Normal (Off) mode.

The Active Noise Cancellation (ANC) mode in E3 reduces outside noise which allows you to fully immerse yourself in your own world.

As soon as your phone recognizes that a phone call is incoming, E3 will automatically pause what you are listening and switch to transparency mode, then let you decide whether to answer the phone call or not.
The transparency mode will be on during the call regardless of use of ANC. When you end the phone call, E3 goes back to normal mode or ANC mode depending on how you were using the earbuds before the call.

How to switch between the modes

The earbuds are in Normal (Off) mode by default, where background noise is neither reduced nor amplified. By holding the touch control for 2 seconds on the right earbud the modes cycle between Normal and Active Noise Cancellation, then back to Normal.

How does Active Noise Cancellation (ANC) work?

The mechanics behind Active Noise Cancellation is in its name. E3 uses Hybrid ANC technology, which is a combination of Feed Forward and Feedback ANC technology. Three microphones are located on the outside and inside of each earbud to effectively capture all kinds of noise, even the noise you hear through your ears while wearing the earbuds. The speakers then emit the recorded noise in real-time - but inverted - which cancels the noise nearly entirely.

E3 - FAQ - Can I use one earbud at a time?

Yes, you can use one E3 earbud on its own for both playback and calls. Both earbuds have the same components (speakers and microphones), which means that you can use either the left or right earbud at your leisure.

Do note though, that since ANC can only be activated from the right earbud and Voice Assistant from the left earbud, the corresponding earbud has to be used in order to enable them. 

To ensure a stable connection, always keep the unused earbud inside the charging case. 

It’s always a good idea to charge both earbuds until full after having used them separately to maintain the same battery levels.

E3 - FAQ - Does E3 support wireless charging?

The E3 case can be charged with a USB Type-C cable but wireless charging is also supported. 

Our product Sudio Ladd+ is compatible with E3 for wireless charging.*

*Please note that Sudio Ladd+ itself is not wireless, it needs to be attached to a cable in order to wirelessly charge your Sudio E3.