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WTV020-SD-16P is a low cost and easy to use MicroSD MP3 module which supports WAV and AD4 formats. It support upto 1GB SD cards. It requires a 3.3V power supply for its operation and its power consumption is very low. You can easily copy voice files to SD Card using PC and it should be in FAT format. This module can be easily interfaced with Arduino Boards, Microcontrollers etc. It can also be used as standalone without any MCU. Please read the datasheet carefully before using this module.
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Mini-size RS232 DB9 female port to RS485 RS422 DB9 male connector Hot-swappable and plug & play, port-powered over RS232 RS485 RS422 Unique serial charge pump drive technology, TXD/RXD/GND communication The range of baud rate: 300bps-115.2Kbps Working Mode: asynchronous half-duplex (RS485) or full-duplex (RS422)
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Description: -Mini PFM Control. -On-board input voltage indicator. -High conversion efficiency, maximum to 96%. -Any DC voltage input 0.9V ~ 5V, output 5V DC voltage can be stable, with two AA batteries input to the output current of 500-600MA, single AA battery power supply output current about 200MA. -On-board USB female, can supply power directly to the USB interface. -Small dimension.