This document is the M5661 User Manual, which describes the features and characteristics of the product, including functions such as USB flash disk and digital audio device.
The M5661 is a portable digital audio player that can also function as a USB flash disk when connected to a PC. It supports internal NAND flash memory and external SD/MMC cards for storage, and offers playback of MP3, WMA, and IMA‑ADPCM audio files with various bitrate and sampling rate options.
The device features a multi‑function button layout, an LCD display, FM tuner (87.5‑108 MHz), and configurable settings such as equalizer modes, virtual surround, and power‑off timers. Firmware can be upgraded via the provided utilities in both end‑user and engineering modes.
| Internal memory type | NAND flash |
|---|---|
| External memory card types | SD, MMC |
| MP3 bitrate range | 8 kbps – 320 kbps |
| FM tuner frequency range | 87.5 MHz – 108 MHz |
The M5661 can operate either as a USB flash disk when connected to a PC or as a stand‑alone digital audio device.
The FM tuner covers 87.5 MHz to 108 MHz.