Check the listing for details. [ Flyron FN-RM02 ] Mini MP3 Voice Recorder Module. Condition: New. Listed at 13.95 USD. Features: One button activation. Equipped with a high quality sensitive microphone. MP3 format recording files will be automatically generated and stored on a micro SD card. Supports max. 32GB micro SD card and supports FAT32 format file system. Recording name is like JREC0001, JREC0002......JREC9999 (supports max. 9999 recording files). Equipped with a LED indicator. It turns on during recording and turns off when it stops recording. Powered via a battery or a rechargeable lithium battery(3.7V or 4.2V) which is charged with a DC5V power source. Audio recorder only. No player function. Dimensions: 20mm(L)*17mm(W)*4.5mm(H) Technical Parameters Power supply mode: Lithium battery Charging voltage: DC5V Charging current: 300mA Recording current: 10mA Standby current: ≤10uA Bit rate of MP3 recordings: 128Kbps