1. Sarrera
This manual provides essential information for the proper use and maintenance of your Koss CS340BT QZ Wireless Bluetooth On-Ear Communication Headset. Please read these instructions carefully before using the headset to ensure optimal performance and longevity.

Image: Koss CS340BT QZ Wireless Bluetooth On-Ear Communication Headset, front view.
2. Paketearen edukia
Egiaztatu elementu guztiak zure produktuaren ontzian daudela:
- Koss CS340BT QZ Wireless Bluetooth On-Ear Communication Headset
- USB-C kargatzeko kablea
- Ear Cushions (pre-installed or spare set)
- Hasiera Azkarreko Gida (ez dago eskuliburu digital honetan sartuta)
3. Aurikularrak gaineanview eta Kontrolak
Familiarize yourself with the various parts and controls of your headset.
3.1. Entzungailuen Diagrama

Image: Diagram illustrating the location of controls on the Koss CS340BT QZ headset.
3.2. Kontrol-funtzioak
- ANC botoia: Zarata aktiboaren ezeztapena aktibatzen edo desaktibatzen du.
- Bolumena igotzeko / Hurrengo abestia botoia: Press briefly to increase volume. Press and hold to skip to the next track.
- Power / Play / Pause / Pair / Answer / End Call Button:
- Eduki sakatuta 3 segundoz pizteko/itzaltzeko.
- Press briefly to play/pause music.
- Luze sakatu 5 segundoz Bluetooth parekatzeko moduan sartzeko.
- Press briefly to answer an incoming call.
- Press briefly during a call to end it.
- Bolumena jaisteko / Aurreko abestia botoia: Press briefly to decrease volume. Press and hold to go to the previous track.
- Mikrofonoaren boom-a: Adjustable boom microphone for clear voice communication.
- USB-C kargatzeko ataka: For charging the headset battery.
- 3.5 mm-ko audio-konexioa: For wired audio connection (cable not included).
4. Konfigurazioa
4.1. Entzungailua kargatzea
Lehenengo aldiz erabili aurretik, kargatu guztiz entzungailuak.
- Connect the supplied USB-C charging cable to the headset's USB-C port.
- Konektatu kablearen beste muturra USB elikatze-iturri batera (adibidez, ordenagailuko USB ataka, USB hormako egokitzailea).
- The LED indicator will show charging status (refer to LED indicator section in Quick Start Guide for specific colors).
- Once fully charged, disconnect the cable. A full charge provides up to 30 hours of Bluetooth-only use or 22 hours with ANC enabled.

Image: USB-C charging port.
4.2. Piztu/Itzaltzea
- Pizteko: Eduki sakatuta Piztu / Erreproduzitu / Eten button for approximately 3 seconds until the LED indicator lights up.
- Itzaltzeko: Eduki sakatuta Piztu / Erreproduzitu / Eten button for approximately 3 seconds until the LED indicator turns off.
4.3. Bluetooth parekatzea
- Ziurtatu entzungailua itzalita dagoela.
- Eduki sakatuta Piztu / Erreproduzitu / Eten button for approximately 5 seconds until the LED indicator flashes rapidly (usually blue and red), indicating pairing mode.
- Zure gailuan (telefono adimenduna, ordenagailua, etab.), gaitu Bluetooth eta bilatu eskuragarri dauden gailuak.
- Select "Koss CS340BT QZ" from the list of found devices.
- Once paired, the LED indicator will typically show a solid blue light or flash slowly.
5. Funtzionamendua
5.1. Zarata Ezabatze Aktiboa (ANC)
Entzungailuak Zarata Ezeztapen Aktiboa du inguruko zarata murrizteko.
- Sakatu ANC botoia once to activate ANC. The LED indicator for ANC will illuminate.
- Sakatu ANC botoia again to deactivate ANC. The ANC LED indicator will turn off.

Irudia: Zarata aktiboa ezeztatzeko sistema martxan.
5.2. Deiak egitea eta jasotzea
The integrated microphone and controls allow for hands-free communication.
- Erantzun deia: Sakatu Piztu / Erreproduzitu / Eten button once when a call comes in.
- Amaitu deia: Sakatu Piztu / Erreproduzitu / Eten botoia behin sakatu dei batean zehar.
- Mikrofonoa doitzea: Position the flexible microphone boom closer to your mouth for optimal voice clarity. The dual microphone CVC 8.0 technology helps eliminate background noise.
5.3. Musika erreproduzitzea
- Erreproduzitu/Pausatu: Sakatu Piztu / Erreproduzitu / Eten botoia behin.
- Bolumena igo: Sakatu Bolumena igo botoia behin.
- Bolumena jaitsi: Sakatu Bolumena jaitsi botoia behin.
- Hurrengo ibilbidea: Eduki sakatuta Bolumena igo botoia.
- Aurreko pista: Eduki sakatuta Bolumena jaitsi botoia.
5.4. Kable bidezko konexioa (aukerakoa)
You can use the headset with a 3.5mm audio cable (not included) for a wired connection, bypassing Bluetooth and ANC functionality.

Image: 3.5mm Audio Jack.
6. Mantentzea
- Garbiketa: Erabili zapi leun eta lehor bat entzungailuak garbitzeko. Ez erabili produktu kimiko gogorrik edo material urratzailerik.
- Biltegiratzea: Gorde entzungailuak leku fresko eta lehor batean, eguzki-argitik eta muturreko tenperaturetatik babestuta.
- Belarrietarako kuxinak: The ear cushions are replaceable. Refer to Koss's official website for replacement parts if needed.
7. Arazoak
Arazoak aurkitzen badituzu, saiatu irtenbide hauek:
| Arazoa | Irtenbidea |
|---|---|
| Entzungailua ez da pizten | Ensure the headset is charged. Connect to a power source using the USB-C cable. |
| Ezin da Bluetooth bidez parekatu | Ensure the headset is in pairing mode (flashing blue/red LED). Turn off and on your device's Bluetooth. Move closer to the device. |
| Soinurik ez | Check headset and device volume levels. Ensure the headset is properly paired and selected as the audio output device. |
| Mikrofonoa ez dabil | Ensure the microphone boom is positioned correctly. Check privacy settings on your device to allow microphone access for the connected application. |
| ANC ez da eraginkorra | Ensure ANC is activated (ANC LED on). ANC is most effective against low-frequency, constant noise. |
8. Zehaztapenak
| Ezaugarri | Xehetasuna |
|---|---|
| Ereduaren izena | CS340BT QZ |
| Konektibitate Teknologia | Haririk gabeko (Bluetooth) |
| Haririk gabeko Komunikazio Teknologia | Bluetooth 5.0 |
| Bluetooth barrutia | 10 metro |
| Zarata Kontrola | Zarata Deuseztatze Aktiboa |
| Mikrofonoa | Dual microphone CVC 8.0 |
| Bateriaren iraupena | Up to 30 hours (Bluetooth only), Up to 22 hours (Bluetooth + ANC) |
| Maiztasun barrutia | 20 Hz - 20,000 Hz |
| Inpedantzia | 36 Ohm |
| Belarrien Kokatzea | Belarrian |
| Kontrol-metodoa | Touch / Physical Buttons |
| 3.5mm Audio Jack | Present (cable not included) |
| Elementuaren pisua | Libra 1.4 (gutxi gorabehera 0.64 kg) |
| Produktuaren neurriak | 3.25 x 8.68 x 9.06 hazbete |
| UPC | 021299197196 |

Image: Extended battery life for the Koss CS340BT QZ headset.
9. Bermea eta Laguntza
9.1. Berme mugatua
The Koss CS340BT QZ headset comes with a Urtebeteko berme mugatua from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use. For full warranty terms and conditions, please refer to the official Koss webwebgunean edo jarri harremanetan bezeroarentzako laguntzarekin.
9.2. Bezeroarentzako arreta
For technical assistance, warranty claims, or further inquiries, please contact Koss customer support:
- Webgunea: Visit the official Koss weblaguntza baliabideetarako, maiz egiten diren galderetarako eta harremanetarako informaziorako gunea.
- Helbide elektronikoa/Telefonoa: Refer to the contact section on the Koss website for specific email addresses or phone numbers.





