1. Introduktion
Tak for købetasing the RUIZU D51 Bluetooth MP3 Player. This device is designed to provide a versatile and high-quality audio and multimedia experience. Please read this manual carefully to understand the product's features and ensure proper operation and maintenance.
2. Sikkerhedsoplysninger
- Udsæt ikke enheden for ekstreme temperaturer, direkte sollys eller høj luftfugtighed.
- Undgå at tabe eller udsætte enheden for kraftige stød.
- Hold enheden væk fra vand og andre væsker.
- Forsøg ikke selv at skille enheden ad eller reparere den. Kontakt kvalificeret servicepersonale.
- Use only the provided USB cable for charging. Ensure the charger output is 500mA-1A.
- Lytning ved høje lydstyrker i længere perioder kan forårsage høreskader.
3. Pakkens indhold
Tjek venligst pakken for følgende varer:
- 1 x RUIZU D51 MP3 Player
- 1 x Kablet øretelefon
- 1 x USB-kabel
- 1 x Brugermanual (dette dokument)

Figure 3.1: RUIZU D51 Package Contents
4. Produktet er slutview
The RUIZU D51 features a CNC metal body, a 1.8-inch TFT color screen, and touch-tone operation. It includes a built-in speaker and supports Micro SD card expansion.

Figur 4.1: Forside View of RUIZU D51 MP3 Player

Figur 4.2: Side View of RUIZU D51 MP3 Player

Figur 4.3: Tilbage View of RUIZU D51 MP3 Player with Speaker and TF Card Slot
5. Kom godt i gang (opsætning)
5.1 Opladning af enheden
Before first use, fully charge your RUIZU D51 MP3 player. Connect the provided USB cable to the device and a compatible USB power adapter (500mA-1A output) or a computer USB port. The charging time is approximately 2 hours.
5.2 Indsættelse af et Micro SD-kort
The device supports Micro SD cards from 1GB to 128GB for expanded storage. Locate the TF-CARD slot on the side or back of the player. Gently insert the Micro SD card until it clicks into place. Ensure the card is inserted in the correct orientation.
5.3 Tænd/sluk
- For at tænde: Press and hold the Power/ON/OFF button located on the side of the device until the screen lights up.
- For at slukke: Press and hold the Power/ON/OFF button until the 'Power Off' prompt appears, then confirm.
5.4 Initial Language Setup
Upon first power-on or after a factory reset, you may need to select your preferred language. The device supports 25 different languages.

Figure 5.1: Language Selection Screen

Figur 5.2: Understøttede sprog
6. Betjeningsvejledning
6.1 Navigation
The RUIZU D51 uses touch-tone controls for navigation. Use the directional buttons (up, down, left, right) and the 'M' (Menu) and 'Return' buttons to move through menus and select options.
6.2 Musikafspilning
The player supports various audio formats including MP3, WMA, APE, FLAC, WAV, DRM, and ACELP. Navigate to the 'Music' icon on the main menu, select your desired track, and press the Play/Pause button to start playback.

Figur 6.1: Understøttede musikformater
6.3 Videoafspilning
The device supports AMV and AVI video formats. Transfer compatible video files to the player and select 'Video' from the main menu to browse and play them.
6.4 Læsning af e-bøger
The RUIZU D51 supports TXT format e-books. Load your TXT files onto the device and access them via the 'E-book' menu option.
6.5 Foto Viewing
View your photos in JPG/BMP format by selecting the 'Photo' option from the main menu.
6.6 Bluetooth-forbindelse
The player features Bluetooth 5.0 for connecting to wireless earphones or Bluetooth speakers. To connect:
- Gå til menuen 'Bluetooth'.
- Slå Bluetooth til.
- Ensure your Bluetooth earphones or speaker are in pairing mode.
- Vælg din enhed fra listen for at parre.
Important Note: The Bluetooth function of this MP3 player CANNOT connect with mobile phones, car Bluetooth systems, or computer Bluetooth. It is designed for audio output to Bluetooth earphones or speakers only.

Figur 6.2: Bluetooth 5.0-forbindelse
6.7 FM radio
To use the FM radio function, you must plug in the wired earphones (included) as they act as the antenna. Navigate to the 'FM Radio' menu, and the device will scan for available stations.
6.8 Stemmeoptagelse
The RUIZU D51 has a built-in microphone and supports WAV/MP3 recording formats. Select 'Recording' from the main menu to start, pause, or save recordings. The recording distance is approximately 3 meters in a straight line.
6.9 Andre funktioner
The device also includes features such as a clock ('Time'), folder management ('Support Folder'), and an equalizer ('EQ') for customizing your audio experience.

Figure 6.3: Function Introduction
7. Vedligeholdelse
- Rensning: Brug en blød, tør klud til at rengøre enheden. Brug ikke flydende rengøringsmidler eller slibende materialer.
- Opbevaring: Opbevar afspilleren et køligt, tørt sted væk fra direkte sollys og ekstreme temperaturer.
- Batteripleje: For at forlænge batteriets levetid bør du undgå at aflade batteriet helt ofte. Oplad enheden regelmæssigt, selvom den ikke er i brug i længere perioder.
8. Fejlfinding
- Enheden tænder ikke: Sørg for, at batteriet er opladet. Tilslut til en strømkilde, og prøv igen.
- Bluetooth not connecting to phone/computer: This is expected behavior. The RUIZU D51's Bluetooth is designed only for connecting to Bluetooth earphones or speakers, not other smart devices.
- FM Radio not working: Ensure wired earphones are securely plugged into the device. They serve as the antenna for the FM radio.
- Kan ikke overføre files: Ensure the USB cable is properly connected to both the player and your computer. The player should appear as a removable disk.
- Screen unresponsive/frozen: Prøv at genstarte enheden ved at holde tænd/sluk-knappen nede. Hvis den stadig ikke reagerer, skal du lade batteriet aflades helt og derefter genoplade det.
9. Specifikationer
| Feature | Specifikation |
|---|---|
| Produktnavn | RUIZU D51 Bluetooth Music Player |
| Model | D51 |
| Farve | Sort |
| Indbygget hukommelse | 8 GB |
| TF Card Expansion | 1GB-128GB supported |
| Skal materiale | Zink legering |
| Spejl materiale | Acrylic plastic |
| Skærmstørrelse | 1.8 inch TFT color screen (128*160 resolution) |
| Bluetooth version | 5.0 |
| Bluetooth-forbindelsesafstand | Approx. 10 meters (straight-line) |
| Understøttelse af musikformater | MP3/WMA/APE/FLAC/WAV/DRM/ACELP |
| Lyrics Format | LRC format |
| Understøttelse af videoformat | AMV/AVI |
| Understøttelse af e-bogsformater | TXT |
| Understøttelse af billedformat | JPG/BMP |
| Optagelsesformat | WAV / MP3 |
| Optagelsesafstand | Approx. 3m (straight-line) |
| Mikrofon | Indbygget |
| USB-forbindelse | USB 2.0 |
| Headset impedans | 16Ω eller 32Ω |
| Headset udgangseffekt | 10mW@32Ω, 20mW@16Ω |
| Indbygget batteri | 250mAh |
| Opladningstid | Approx. 2 hours (with 500mA-1A charger) |
| Music Playback Time (wired) | Ca. 25 timer |
| Musikafspilningstid (Bluetooth) | Ca. 6 timer |
| Video Playback Time (wired) | Ca. 6 timer |
| Radio Playback Time | Ca. 7 timer |
| Optagelsestid | Ca. 26 timer |
10. Brugertips
- For optimal sound quality, consider using high-quality wired headphones, especially for lossless audio formats.
- Regularly back up your files from the player to a computer to prevent data loss.
- Keep the firmware updated if new versions become available (check the manufacturer's webwebsted).
- To save battery, reduce screen brightness and turn off Bluetooth when not in use.
11. Garanti og support
Your RUIZU D51 MP3 Player comes with a standard manufacturer's warranty. Please retain your proof of purchase for any warranty claims. For technical support, troubleshooting assistance, or service inquiries, please contact the seller or manufacturer directly through their official channels.





