The Mumu V55 digital music player features a 4.3‑inch LCD screen (480×272) and supports a wide range of audio formats (MP3, WMA, AAC, M4A, OGG, WAV, FLAC, APE) as well as video formats up to 1080p. It includes USB 2.0 high‑speed transfer, TF‑card expansion, PAL TV output, FM radio, e‑book reading, and various auxiliary functions such as a calendar, stopwatch, and voice recorder.
The manual provides safety precautions, basic operation instructions, power‑management settings, firmware upgrade steps, and troubleshooting tips. Users are guided through connecting to a PC, charging the built‑in battery, resetting the device, and customizing display, audio, and language settings. This manual is written in Chinese.
| Screen size | 4.3 inches LCD, 480×272 pixels |
|---|---|
| Supported audio formats | MP3, WMA, AAC, M4A, OGG, WAV, FLAC, APE |
| Supported video formats | MKV, TS, WMV, ASF, RMVB, AVI, FLV, MPG, DAT, VOB, MP4, MOV, 3GP |
| USB interface | USB 2.0 high‑speed |
| Battery capacity | 30 mAh |
Insert a paperclip into the RESET hole and press the hidden reset button to restore the device.
Connect the USB cable to a computer or charger; the battery icon will show charging and full charge is reached in about 5 hours.
Visit http://www.mumumusic.com, download the V55 firmware package, unzip it on a PC, and follow the upgrade instructions in the manual.
Check that the battery has charge, connect a power adapter, and if it still does not start, contact the dealer.