acme BH420W True Wireless Earbuds Headphones User Manual

BH420W
True Wireless
Earbuds
BLUETOOTH EARPHONES
User manual

Technical specifications

Type: in-ear, Bluetooth
Frequency response: 20-20,000 Hz
Driver size: 8,2 mm
Bluetooth version: v5.0 + EDR
Frequency range: 2.4–2.48 GHz
Maximal output radio frequency power: 8 dBm / 6,3 mW
Working distance: up to 10 m
Power supply: USB Type-C, 5 V DC
Microphone: built-in
Battery (charging case): Li-ion, 3.7 V, 450 mAh (1.67 Wh)
Earphones Charging time: up to 1,5 hours
Charging time of the charging case: up to 2 hours
Standby time: about 400 hours
Playback time: up to 5 hours
Recharging with the charging case: 3 times
Total weight: 40 g
WARNING: Listening at a high volume for a long time may damage your hearing.

Product overview

1. Power (multifunction button)
2. Indicator light and MIC
3. Speaker
4. Charging contacts
5. Charging indicator
6. Battery status button
7. USB Type-C charging port

Before you start using the earphones, you must charge the battery and pair the earphones with a compatible device.

Charging the earphones and charging case

The BH420W charging case has an internal, rechargeable battery that must be fully charged before being used for the first time. It takes about 2 hours to fully charge the battery for the first time. If you do not use the device for a long period of time, please charge it once every 2 months to avoid damage to the battery.

• Put the earphones in the charging case and close the cover to charge. During charging, the indicators will show a steady red color. When the battery is fully charged, the red light will turn off.
• Use the USB charging cable to charge the charging case. The indicator lights of the charging case are blinking blue when being charged. They will turn off automatically after being fully charged.

Fully charged earphone batteries have the power for up to 5 hours of playback time (15 hours more from the charging case). When the batteries are running out of power, a sound prompt will be heard. This indicates that the earphones need to be charged as soon as possible.

Pairing

Automatic (first-time setup) method:

• Power on or remove the two earphones from the charging case and wait for 3 seconds. The two earphones will power on and enter to the pairing mode automatically. A fast blinking red/blue LED from the left headphones will indicate that the earphones are ready to pair with your device.
• Turn on the Bluetooth function on your device, select BH420W from the list, and pair the earphone.
• A voice prompt will be heard from the right earphone saying that the earphones are connected.

Manual method:

• When both earphones are in an off state, press and hold the power (multifunction) button of both earphones till a blue LED indicator is seen. Release the right earphone power button, but keep holding the left earphone power button until a fast-blinking red/ blue LED will be seen.
• Turn on the Bluetooth function on your device, select BH420W from the list, and pair the devices.
• A sound prompt will be heard from the right earphone confirming that the earphones are connected.

If no Bluetooth connection is made within 5 minutes, the earphones will turn off automatically.

Basic Use

To switch on, when both earphones are in an off state, press and hold the power (multifunction) button for 3 seconds for both earphones at the same time until the blue indicator light comes on.
To switch off, when both earphones are in an on state, press and hold the power (multifunction) button of one corresponding (left or right) for 3 seconds to power off both earphones until the red indicator light flashes or just put them back into the charging case.
Automatic reconnection
When both earphones are in an off state, remove them from the charging case at the same time, and they will reconnect automatically.
Answer a call
When there is an incoming call, press the power (multifunction) button on the left or right earphone.
Reject a call
Press and hold the power (multifunction) button of the left or right earphone for 2 seconds.
End a call
To end the call, press the power (multifunction) button on the left or right earphones.
Play/Pause
Double-tap the power (multifunction) button to pause/play the song.
Increase/Decrease volume
Press the right earbud power button to increase the volume. Press the left earbud power button to decrease the volume.
Next/Previous song
Press and hold the right earbud power button to change the song to the next one. Press and hold the left earbud power button to change the song to the previous one.
Voice assistant
Triple tap left or right earbud and the smartphone’s assistant will appear. After the prompt sound, you can ask any question and the answer will play to the earphones.

Wearing the earphones

To properly wear the earphones:
STEP 1. Place the earphones in the ears as shown.
STEP 2. Slightly rotate the earphone until it gets tight.

LED indications

alternately; when successfully connected to the device, the indicator light keeps lighting blue.
2| Call state| In the case of the incoming call, the indicator lights are blinking blue.
3| Headset charging state| The indicator light of the headset is red when being charged and will turn off automatically after being fully charged.
4| Charging case charging state| The indicators blink blue when being charged and will turn off automatically after being fully charged.
5| Power-on state| If earphones are connected to the device, the indicator light of the left earphone stays blue.
6| Power off state| The indicator light stays red for 2 seconds and switches off.

Troubleshooting

• The earphones cannot be turned on.
• The earphones turn off automatically.
• The earphones cannot turn on by picking them up from the charging case.| Charging case low battery protection.
Recharge your earphones and charging case.
• Music is not playing.| Make sure that both devices are paired and connected and that “Media playback” is enabled in your Bluetooth settings. Try to pair it again.
• Pairing was successful but the device cannot find the right earphone or reconnect/connect.| Too many pairing records. Delete pairing records (unpair) and try again. It is possible that you are not able to connect because the earphones are paired
with another nearby device. You will have to disconnect the other device, or even turn off its Bluetooth function. Now you can try again to pair or reconnect. To reset earphones, put them in to
the charging box and hold the power button of both earphones for 5 seconds till a sound prompt will be heard.
• The charging case indicator has no light while charging.| DC power supply does not output power.
Check your USB connections and try to charge with a different charger.
• The earphone indicator has no light while charging.| Check the pogo pin charging points. Place
the earphone correctly in the charging case.
• Only one earphone is working| Turn off both earphones. Turn on both earphones again at the same time.

Care and maintenance

• Don’t use abrasive cleaning solvents to clean the headset.
• Do not expose the headset to extremely high or low temperatures as this will shorten the life of electronic devices, destroy the battery or distort certain plastic parts.
• Don’t dispose of the headset in a fire as it will result in an explosion.
• Don’t expose the headset to contact with sharp objects as this will cause scratches and damage.
• Don’t let the headset fall down onto the floor. The internal circuit might get damaged.

Waste Electrical and Electronic Equipment (WEEE) Symbol
The use of the WEEE symbol indicates that this product may not be treated as household waste. By ensuring this product is disposed of correctly, you will help protect the environment. For more detailed information about the recycling of this product, please contact your local authority, your household waste disposal service provider or the shop where you purchased the product.

Warranty card

Failures (date, description, position of the person who accepts the product, first name, last name and signature)

1. Warranty period
Warranty enters into force starting with the day when the buyer acquires the product from the seller. The warranty period is indicated on the package of the product.
2. Warranty conditions
The warranty is valid only by providing an original document of the product acquisition and this warranty sheet, which includes the name of the product model, product purchase date, name, and address of the seller.
If it is noticed during the warranty period that the product has faults and these faults were not caused by any of the reasons when the warranty is not applied as indicated in the paragraphs below, the manufacturer undertakes to replace the product.
The warranty is not applied to regular testing, maintenance, and repair or replacement of the parts which are worn out naturally.
The warranty is not applied if damage or failures occurred due to the following reasons:

• Inappropriate installation of the product, inappropriate usage and/or operating the product without following the manual, technical requirements and safety standards as provided by the manufacturer, and additionally, inappropriate warehousing, falling from heights as well as hard strikes.
• Corrosion, mud, water and sand.
• Repair works, modifications or cleaning, were performed by a service not authorized by the manufacturer.
• Usage of the spare parts, software or consumptive materials which do not apply to the product.
• Accidents or events or any other reasons which do not depend on the manufacturer, which include lightning, water, fire, magnetic field, and inappropriate ventilation.
• If the product does not meet the standards and specifications of a particular country, in which it was not bought. Any attempt to adjust the product in order to meet technical and safety requirements such as those in the other countries withdraws all the rights to the warranty service.

If no failures are detected in the product, all the expenses in relation to the service are covered by the buyer.

Designed in EU by ACC Distribution UAB,
Raudondvario pl. 131B, LT-47191, Kaunas, Lithuania
E-mail: support@acme.eu
Rev. 1.0 Printed in China
www.acme.eu

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