... loosen, *without cards'compatibility issue Pre-record module, MP3 module, Voice module--serial embedded moduleMP3 Modules Built-in Memory, WT8601M02 ... Features* Support 8Kbps ~ 320Kbps bit-rate, MP3 format audio files* Stereo audio output. * Control interface: key, DSA .* Support to ... can be downloaded by USB directly.* With serial interface control mode, which is not available in other modules. It ...