? 1, the product features a 28-pin module package can be obtained by replacing the memory for different lengths of voice storage time; support 2M bit ~ 32M bit capacity of SPI-Flash (Note: 1byte = 8bit);? Using WT588D-20SS voice chip? as the master key;? embedded unique vocal voice processor, so the performance is very natural and melodious voice;? Built-in 13Bit / DA converters, and 12Bit / PWM audio processing, to ensure high-quality voice output;? Support loading 6K ~ 20KHz sampling rate WAV audio;? PWM output can be directly promote 0.5W / 8Ω speaker, push-pull current abundant;? Support DAC / PWM two output modes;? Support key control mode, the first-line serial control mode, three-wire serial control mode;? under key control mode can be set to trigger a variety of IO ports way;? provided significant number of any given language state BUSY output shows the letter sound playback;? Load up to 500 segments for editing voice;? 220 segment address bits can be controlled, Load up a single address bit 128 segments of voice, a voice within the broadcast address bit combinations;? voice playback is stopped immediately goes into sleep mode;? WT588D VoiceChip supporting PC software, the interface is simple and easy to use. Can greatly limit play WT588D-U voice module functions;? In software control mode is set to be completed, the combination of voice, voice calls, insert silence and other operations;? Can easily insert silence, mute time range is 10ms ~ 25min; ? USB download way, support online download / offline download; even in the case of WT588D-U voice module is powered, the same can not download data to SPI-Flash;? Working voltage DC2.8V ~ 5.5V;? Sleep Current less than 10uA;? strong anti-interference, can be applied in the industrial field; 2, the function keys control mode trigger describe a flexible manner, are free to set any buttons for pulse can repeat trigger pulse can not repeat trigger, invalid buttons, level keep non-recyclable The level can be recycled to maintain the level of non-recyclable maintain, on a non-circulating, in a non-circulating, on a recyclable, under a recyclable, Volume +, Volume -, play / pause, stop, Play / Stop and other 15 kinds of trigger; line serial control mode and three-wire serial control mode can be controlled by the MCU code transmitting end voice play, stop, loop playback and volume size, or directly trigger any voice from 0 to 219-bit address. 3, the application range of wide range of applications, almost all of the voice can relate to places such as the stops, alarm, reminder, alarm clock, machine learning, intelligent appliances, therapeutic equipment, electronic toys, telecommunications, parking sensors and a variety of automatic control devices and other places, to meet the requirements of industrial applications of the craft.