... not loosen, *without cards'compatibility issue Pre-record module, MP3 module, Voice module--serial embedded moduleMP3 Modules Built-in Memory ... module, message module Features* Support 8Kbps ~ 320Kbps bit-rate, MP3 format audio files* Stereo audio output. * Control interface: key, ... cooker and so on, as well as advanced toys, automotive electronic systems, long time playback systems require, etc. ,