Operating Voltage: DC2.5~3.6V Quiescent Current: 16uA (SD card is not inserted) Supports the SD card maximum capacity of 1G; Supports playback of 4Bit ADPCM format files; Automatically recognize the voice files; Can be loaded for 6KHz to 32KHz, 36KHz sampling rate AD4 audio; Can be loaded for 6KHz~16KHz WAV audio sample rate; Can store up to 512 voice; WTV020-SD-20S, WTV020-SD-16P two module types; Voice playback can call any paragraphs; Power-down save operation data capabilities; Support files combination play, mute combination included; The default mode is serial control mode Dimensions: Approx. 0.78*0.71*0.47 inch / 2*1.8*1.2cm
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