SENNHEISER ACCENTUM OPEN OTW1 C (01) PDF MANUAL

Read this instruction manual carefully and completely before using the product.

Always include this instruction manual when passing the product on to third parties.

Do not use the product if it is obviously defective or makes loud, unusual (whistling or beeping) noise.

Only use the product in environments where Bluetooth® wireless transmission is permitted.

Protect your hearing from high volume levels. Permanent hearing damage may occur when earbuds are used at high volume levels for long periods of time. Sennheiser earbuds sound exceptionally good at low and medium volume levels.

Do not insert the earbuds too deep into your ears. Always remove the earbuds slowly and carefully from your ears.

The product generates stronger permanent magnetic fields that could cause interference with cardiac pacemakers, implanted defibrillators (ICDs) and other implants. Always maintain a distance of at least 3.94″/10cm between the product component containing the magnet (earbuds and charging case) and the cardiac pacemaker, implanted defibrillator, or other implant.

Keep the product, accessories and packaging parts out of reach of children and pets to prevent accidents. Swallowing and choking hazard.

Do not use the product in an environment that requires your special attention (e.g. in traffic).

Always keep the product dry and do not expose it to extreme temperatures (hairdryer, heater, extended exposure to sunlight, etc.) to avoid corrosion or deformation. The normal operating temperature is from 0°C to 40°C/32°F to 104°F.

Do not use if immersed into liquid.

Use only attachments/accessories/spare parts supplied or recommended by Sonova Consumer Hearing.

Clean the product only with a soft, dry cloth.

WARNING: If abused or misused, rechargeable batteries may leak. In extreme cases, they may even present a risk of explosion, heat and fire development, smoke and/or gas development, or damage to health and/or the environment.

Only use rechargeable batteries and chargers recommended by Sonova Consumer Hearing.

Do not leave the product/rechargeable batteries unattended while charging.

Only charge the product/rechargeable batteries at ambient temperatures between 5°C and 35°C/41°F and 95°F and do not charge them near easily flammable objects.

Do not charge the product/rechargeable batteries in a damp or humid environment. Make sure that the charging socket is free from moisture and contamination.

Do not heat the product/rechargeable batteries above 70°C/158°F. Avoid exposure to sunlight and do not throw the product/rechargeable batteries into fire.

Switch rechargeable battery-powered products off after use.

When not using the product/rechargeable batteries for extended periods of time, charge them regularly (about every 3 months).

This product contains coin rechargeable batteries. If you think the product/a coin rechargeable battery has been swallowed or is lodged in the body, seek medical assistance immediately.

Avoid prolonged skin contact with the product, rechargeable battery, charger or charging cable when connected to a power source. These components can heat up during charging and cause skin irritation.

Dispose of defective products with built-in rechargeable batteries at special collection points or return them to your specialist dealer to facilitate recycling.

The earbuds feature an IPX4 ingress protection rating which means they are protected from the ingress of water (splash proof). This is according to International Protection Marking (IP code), IEC standard 60529, tested under laboratory conditions.

The earbuds can be used in the rain, for example. However, they are not suitable for immersion in water or for wearing in the shower. In case of permanent moisture/wetness, the ingress protection can be reduced and the product can be damaged.

Do not charge wet earbuds. Completely dry wet earbuds with a dry cloth before charging them.

The charging case is not splash waterproof. Always keep the charging case dry and make sure the charging socket is free from moisture and contamination. Only use high-quality USB charging cables with USB-IF certification.

Earbud R for right ear (model: OTW1 R) and earbud L for left ear (model: OTW1 L)

Charging case (model: OTW1 C) with built-in rechargeable battery for the earbuds

USB charging cable with USB C and USB A connector, approx. 0.4 m

Quick guide

Safety guide

Compliance sheet

Charging case (Model: OTW1 C)

1. LED display: indicates the charging process/charge status.

2. Input for USB C connector: for charging the rechargeable batteries.

3. Bottom cradle

4. Charging compartment for the left earbud L

5. Top cradle

6. Charging contacts

7. Charging compartment for the right earbud R

8. Built-in rechargeable battery: for charging the earbuds on the go.

Earbuds (Model: OTW1 R and OTW1 L)

9. Touch control panel

10. Microphones for beamforming noise reduction

11. Acoustic rear ventilation

12. Acoustic front ventilation

13. Built-in rechargeable battery

14. Speaker

15. Left earbud L

16. Charging contacts

17. Right earbud R

The meaning of the LED indicator depends on whether a USB cable is connected or not.

When a USB cable is connected:

When no USB cable is connected (lid is opened):
The LED display switches off 5 seconds after closing the lid.

If the LED display does not light up:

• Clean the contacts on the earbuds and in the charging case.

• Charge the rechargeable batteries of the charging case and the earbuds until the LED display lights up again (at least 30 minutes).

Upon delivery, the rechargeable batteries are in sleep mode. You must wake them up by connecting them to a power source.

1. Insert the earbuds into the charging case and close the lid.

2. Connect the USB C cable to the charging case.

3. Connect the cable to a USB power source and charge for at least 15 seconds. The earbuds and charging case will wake up, and the batteries will begin to charge.

It is recommended to charge the earbuds and the charging case for a complete charging cycle (approx. 1 hour) without interruption before first use.

The correct fit provides the best sound quality, voice quality, and wearing comfort.

1. Assign the right earbud (R) to your right ear and the left earbud (L) to your left ear.

2. Insert the earbuds straight into your ears with the stem pointing downwards.

3. Twist the earbuds slightly in the ear so that the stem points towards your mouth until the earbuds sit comfortably and snugly in the ear.

A complete charging cycle takes about 1 hour. A quick charge of 10 minutes provides approximately 1.5 hours of playback time.

1. Open the charging case lid. Insert the left earbud into the left compartment and the right earbud into the right compartment. The earbuds are magnetically pulled into place.

2. Close the lid of the charging case. Ensure the charging socket is free from moisture and contamination. Connect the USB C end of the charging cable to the charging case’s USB socket.

3. Connect the USB A end of the cable to a USB power source. The batteries of the earbuds and charging case will begin charging. The LED on the case indicates the charging status.

If no earbuds are inserted, only the charging case battery will be charged.

When you take the earbuds out of the case for the first time after initial charging, they automatically enter pairing mode. If the pairing list is empty, pairing mode remains permanently active. To manually start pairing:

1. Take both earbuds out of the charging case and insert them into your ears. The distance to the Bluetooth device should be no more than 1 m / 40 inches.

2. Simultaneously touch and hold the right and left touch control panels for 3 seconds until you hear a short, repetitive melody indicating pairing mode.

3. Activate Bluetooth on your device and search for new Bluetooth devices.

4. From the list of found devices, select “ACCENTUM Open”. If necessary, enter the default PIN code “0000”.

If pairing is successful, you will hear an ascending sequence of two tones. If no connection is made within 2 minutes, pairing mode terminates.

The earbuds can save the connection profiles of up to eight Bluetooth devices. You can have two active Bluetooth connections at the same time, but audio playback is only possible from one device at a time.

To connect to an additional device, initiate pairing mode as described in the pairing instructions.

When switched on, the earbuds will automatically try to connect to the last two Bluetooth devices used.

If you pair the earbuds with a ninth Bluetooth device, the connection profile of the first-paired device will be overwritten.

Via the Bluetooth menu of your device, disconnect the connection to the earbuds. You will hear a descending sequence of two tones, and the earbuds will search for other paired devices. If none are found, they will switch to idle mode.

Switching On:

The earbuds switch on automatically when you open the lid of the charging case. Simply open the lid and take out both earbuds. If a paired device is in range, they will connect automatically.

Switching Off:

The earbuds do not need to be switched off explicitly. Insert the earbuds into the charging case and close the lid. They will automatically switch off and begin charging.

Adjusting Volume:

• To increase volume: Touch and hold the touch control panel of the right earbud.

• To decrease volume: Touch and hold the touch control panel of the left earbud.

When minimum or maximum volume is reached, you will hear a sequence of two high tones.

Music Playback Controls:

• Play/Pause music: Tap the touch control panel of the right or left earbud 1x.

• Play the next track: Tap the touch control panel of the right earbud 2x.

• Play the previous track: Tap the touch control panel of the left earbud 2x.

The earbuds automatically detect when you are wearing them. Music playback pauses when you remove an earbud and resumes when you insert it again. If the interruption is longer than 3 minutes, playback will not start automatically.

To disable or enable the Smart Pause function, tap the touch control panel of the left earbud 3x.

During a call, you can use the right and/or left earbud to control call functions. If your device doesn’t automatically transfer the call, select “ACCENTUM Open” as the audio output on your device.

When connected to a Bluetooth device, the battery status may be displayed on the screen of your device.

You can also check the status using the charging case LED by opening the lid (without a USB cable connected):

• Lights up green: Earbuds are fully charged, and the case has >50% charge.

• Lights up yellow: Earbuds are fully charged, and the case has <50% charge.

• Pulses yellow: Earbuds are currently charging from the case battery.

• Lights up red: The batteries of the earbuds and the case are almost empty.

• Flashes red: There is a charging or battery error.

Store the earbuds in the charging case to prevent damage when not in use or during transport. The earbuds will be automatically charged in the case, ensuring they are ready for use.

ATTENTION: Moisture and dirt can damage the electronics. Do not place the earbuds in the charging case if they are wet or dirty.

1. Open the charging case by overcoming the magnetic resistance.

2. Insert the left and right earbuds into their respective charging compartments. They will be magnetically pulled into place.

3. Close the lid of the charging case.

ATTENTION: Liquids can damage the product’s electronics. Keep all liquids far away and do not use any solvents or cleansing agents.

• Only clean the charging case with a soft, dry cloth.

• Clean the earbuds with a slightly damp cloth.

• Clean the charging contacts on the earbuds and in the charging case from time to time, for example, with a cotton swab.

• To remove dirt, dust, or lint from the USB socket of the charging case, carefully swipe a fine object (e.g., a toothpick or interdental brush) through the opening.

If the earbuds get wet, dry them with a dry cloth. If necessary, let them air dry at room temperature for approximately 12 hours.

If a problem occurs, proceed in the following order:

1. Perform a simple reset: Insert the earbuds into the charging case, close the lid, and wait for at least 10 seconds.

2. Reset the earbuds to factory default settings.

3. Check the list of frequently asked questions for a solution.

The transmission range is up to 10 meters with a free line of sight. If you leave this range, the sound quality will deteriorate until the connection breaks completely, and you will hear a descending sequence of two tones. If you immediately re-enter the transmission range, the connection is automatically re-established, and you will hear an ascending sequence of two tones. If not, tap the touch control panel of one earbud one time to reconnect.

If the function of the earbuds is disturbed, perform a reset. This will not delete individual settings like pairing information.

1. Insert the earbuds into the charging case.

2. Close the lid of the charging case and wait at least 10 seconds.

3. Open the lid again. The earbuds will restart (reset).

If a reset does not solve the issue, you can reset the earbuds to their factory defaults. This will delete all pairing settings.

1. Disconnect the earbuds from your device by removing “ACCENTUM Open” from the list of Bluetooth devices.

2. Take one earbud out of the charging case and insert it in your ear. Close the lid of the charging case, leaving the second earbud inside.

3. Tap and hold the touch control panel of the earbud in your ear for 12 seconds. You will hear a sequence of three tones.

4. Now take the second earbud out of the charging case and insert it in your other ear.

5. Tap and hold the touch control panel of this second earbud for 12 seconds. You will hear a sequence of three tones.

6. Remove both earbuds from your ears and place them close together. Within 15 seconds, the earbuds will connect to each other, confirming a successful factory reset and peer pairing.

You will now need to pair your earbuds with your Bluetooth device again.

If you suspect that a rechargeable battery is obviously defective or if a charging error/battery error is displayed (flashing red LED), stop using the product, disconnect it from the power supply system and contact your Sonova Consumer Hearing partner. Do not return a product with a defective battery unless requested to do so.