1. Introduktion
Denne manual indeholder detaljerede instruktioner til opsætning, betjening og vedligeholdelse af din Holdsound BKM400 Wireless TV Headphones. Please read this manual thoroughly before using the product to ensure proper function and to maximize your listening experience.
Hvad er der i æsken:
- Holdsound BKM400 Wireless Headphones
- USB Transmitter
- Type-C opladerkabel
- Optisk kabel
- 3.5 mm AUX-kabel
- RCA (red/white) Cable

2. Sikkerhedsoplysninger
To ensure safe and proper use of your headphones, please observe the following guidelines:
- Høreværn: Undgå at lytte ved høje lydstyrker i længere perioder for at forhindre høreskader.
- Miljøbevisthed: Do not use headphones in situations where inability to hear ambient sounds could be dangerous (e.g., driving, cycling, walking in traffic).
- Rensning: Clean the headphones with a soft, dry cloth. Do not use liquid cleaners or aerosols.
- Batteripleje: Do not attempt to replace the battery yourself. Dispose of batteries according to local regulations. Avoid exposing the headphones to extreme temperatures.
- Vandeksponering: These headphones are not waterproof. Avoid exposure to rain, moisture, or submersion in liquids.
3. Produktet er slutview
The Holdsound BKM400 Wireless TV Headphones are designed to provide a private and immersive audio experience for television viewing. Key features include:
- Privat lytning: Enjoy TV audio without disturbing others, ideal for late-night viewing or shared living spaces.
- Forbedret klarhed: Features boosted volume and vocal clarity, beneficial for users with mild hearing loss.
- Plug & Play-tilslutning: Simple setup with a USB transmitter, supporting various audio output options (USB, Optical, AUX, RCA).
- Ultra-lav latens: Advanced Bluetooth 5.3 technology ensures audio-video synchronization with less than 40ms delay.
- Udvidet rækkevidde: Reliable wireless range up to 50 meters (164 ft) allows freedom of movement.
- Lang batterilevetid: Op til 40 timers kontinuerlig spilletid på en enkelt opladning.
- Komfortabelt design: Adjustable headband and soft, breathable memory-protein ear cups for extended wear.

4. Opsætning
The Holdsound BKM400 headphones offer multiple connection methods to your TV. Choose the method that best suits your TV's available audio output ports.
4.1. USB Connection (Recommended for TVs with USB Audio Output)
This method is ideal for TVs that support audio output via their USB port. No additional audio cables are required.
- Insert USB Transmitter: Sæt stikket i Holdsound USB Transmitter directly into an available USB AUDIO OUT port on your TV. The indicator light on the transmitter will flash red and blue alternately, indicating it is in pairing mode.
- Tænd hovedtelefoner: Long press the power button on the headphones for approximately 3 seconds to turn them on. The indicator light on the headphones will also flash red and blue alternately.
- Parring: After a few seconds, a slow breathing blue light will appear on both the headphone and the transmitter, indicating successful pairing.
- Adjust TV Audio Settings (if no sound): If you experience no sound, navigate to your TV's audio settings and ensure the Format for digital lydudgang er indstillet til PCM. Refer to your TV's manual for specific instructions.

Video 1: USB Connection Operation. This video demonstrates how to connect the headphones using the USB transmitter.
Video 2: How to Set Up PCM on TV. This video guides you through adjusting your TV's audio output settings to PCM.
4.2. 3.5mm AUX Connection
Use this method if your TV has a 3.5mm headphone or audio out jack.
- Tænd senderen: Sæt stikket i 3.5 mm AUX-kabel into the transmitter's 3.5mm AUX port. Insert the transmitter directly into your TV's USB port or into an external USB power supply for power. The indicator light on the transmitter will flash red and green alternately.
- Tilslut til tv: Sæt den anden ende af 3.5 mm AUX-kabel into the 3.5mm/Headphone Audio Out port on your TV.
- Tænd hovedtelefoner: Long press the power button on the headphones for approximately 3 seconds to turn them on. The indicator light on the headphones will flash red and blue alternately.
- Parring: When a slow breathing blue light is on the headphone and a slow breathing green light is on the transmitter, the pairing is successful.
- Adjust TV Audio Settings (if no sound): If no sound, adjust your TV's audio settings to USB or switch to another connection method.
Video 3: 3.5mm AUX Connection Operation. This video demonstrates how to connect the headphones using a 3.5mm AUX cable.
4.3. Optisk forbindelse
Use this method if your TV has a Digital Optical/SPDIF Audio Out port.
- Prepare Optical Cable: Remove the plastic protective caps from both ends of the Optisk kabel. Ensure the optical cable connects correctly to your TV.
- Tænd senderen: Sæt stikket i Optisk kabel into the transmitter's optical port. Insert the transmitter directly into your TV's USB port or into an external USB power supply for power. The indicator light on the transmitter will flash red and white alternately.
- Tilslut til tv: Sæt den anden ende af Optisk kabel into the Digital Optical/SPDIF Audio Out port on your TV.
- Tænd hovedtelefoner: Long press the power button on the headphones for approximately 3 seconds to turn them on. The indicator light on the headphones will flash red and blue alternately.
- Parring: When a slow breathing blue light is on the headphone and a slow breathing white light is on the transmitter, the pairing is successful.
- Adjust TV Audio Settings (if no sound): If no sound, navigate to your TV's audio settings and ensure the Format for digital lydudgang er indstillet til PCM.
Video 4: Optical Connection Operation. This video demonstrates how to connect the headphones using an optical cable.
4.4. RCA-forbindelse
Use this method if your TV has red and white RCA Audio Out ports.
- Connect RCA and AUX Cables: Tilslut RCA-kabel til 3.5 mm AUX-kabel.
- Tænd senderen: Sæt stikket i 3.5 mm AUX-kabel into the transmitter's 3.5mm AUX port. Insert the transmitter directly into your TV's USB port or into an external USB power supply for power. The indicator light on the transmitter will flash red and green alternately.
- Tilslut til tv: Plug the red and white ends of the RCA-kabel into the corresponding red and white RCA AUDIO OUT ports on your TV.
- Tænd hovedtelefoner: Long press the power button on the headphones for approximately 3 seconds to turn them on. The indicator light on the headphones will flash red and blue alternately.
- Parring: When a slow breathing blue light is on the headphone and a slow breathing green light is on the transmitter, the pairing is successful.
- Adjust TV Audio Settings (if no sound): If no sound, navigate to your TV's audio settings and ensure the Format for digital lydudgang er indstillet til PCM.
Video 5: RCA Connection Operation. This video demonstrates how to connect the headphones using an RCA cable.
5. Betjeningsvejledning
5.1. Tænd/sluk
- For at tænde: Long press the power button on the headphones for approximately 3 seconds. The indicator light will illuminate.
- For at slukke: Long press the power button again for approximately 3 seconds. The indicator light will turn off.
5.2. Lydstyrkekontrol
The headphones feature 16 justerbare lydstyrker. Use the volume up (+) and volume down (-) buttons located on the earcup to adjust the listening volume to your preference.
5.3. Re-pairing (One-Button Reset)
If the headphones lose connection or fail to pair, simply turn the headphones off and then on again. The system is designed for an intuitive one-button reset to re-establish connection quickly.

6. Vedligeholdelse
6.1. Rensning
- Wipe the headphones and transmitter with a soft, dry, lint-free cloth.
- Brug ikke slibende rengøringsmidler, opløsningsmidler eller kemiske midler.
- Undgå at fugt kommer ind i åbninger.
6.2. Opbevaring
- Opbevar hovedtelefonerne et køligt, tørt sted væk fra direkte sollys og ekstreme temperaturer.
- Når hovedtelefonerne ikke er i brug i længere perioder, skal du sørge for at de er fuldt opladet inden opbevaring for at bevare batteriets sundhed.
7. Fejlfinding
If you encounter issues with your Holdsound BKM400 headphones, please refer to the following common problems and solutions:
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Ingen lyd fra hovedtelefoner | Headphones not paired; TV audio output settings incorrect; Volume too low; Incorrect cable connection. | Ensure headphones are powered on and paired (slow breathing blue light). Check TV audio output settings (set to PCM for Optical/RCA, or USB for USB connection). Increase headphone and TV volume. Verify all cables are securely connected to the correct ports. |
| Hovedtelefoner parres ikke | Out of range; Interference; Pairing mode not active. | Ensure headphones and transmitter are within range (up to 50m). Turn headphones off and on again to re-enter pairing mode. Avoid strong electromagnetic interference. |
| Lydforsinkelse/latens | TV processing delay; Signal interference. | The BKM400 features ultra-low latency. If delay occurs, ensure TV audio settings are optimized (e.g., disable any additional audio processing on the TV). Try moving closer to the transmitter. |
| Kort batterilevetid | Højt forbrug; Batteriforbrug over tid. | Reduce listening volume. Ensure headphones are fully charged before use (charging time: 3-4 hours). |
| Dårlig lydkvalitet | Weak signal; Incorrect audio format; Damaged cable. | Ensure strong, clear connection. Verify TV audio output is set to PCM. Try a different audio cable if applicable. |
8. Specifikationer
| Feature | Specifikation |
|---|---|
| Modelnavn | BKM400 |
| Forbindelsesteknologi | Trådløs (Bluetooth 5.3) |
| Wireless Range | Op til 50 meter (165 fod) |
| Lydforsinkelse | Less than 40 milliseconds |
| Batterilevetid | Op til 40 timer (ved medium volumen) |
| Opladningstid | 3-4 timer |
| Audio driver størrelse | 40 millimeter |
| Ørestykke form | Over Ear |
| Støjkontrol | Passiv støjreduktion |
| Inputenhedsgrænseflade | 3.5 mm Audio Output, Optical Audio Output, RCA Audio Output, USB Audio Output |
| Særlige funktioner | Adjustable Headband, Lightweight, Rechargeable Battery, Volume Control |
9. Garanti og support
Holdsound products are manufactured with high-quality standards. For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official Holdsound webwebsted. Gem venligst din købsbevis til garantikrav.