Supports in GB2312, GBK, BIG5 and UNICODE internal code formats; Clear, natural and accurate Chinese speech synthesis effect; can synthesize any Chinese , and support the synthesis of English letters; With intelligent analysis and processing algorithms, it can correctly identify numerical values, numbers, time and date and commonly used weights and measures symbols; Strong to process polyphonic words and Chinese surnames; Support a of control tags to the accuracy of processing; The amount of synthesized each time can be up to 200 bytes; Support a of control commands, including: synthesis, stop, pause synthesis, continue synthesis, change rate, etc.; Support sleep function, which can reduce power consumption in sleep state; support multiple ways to query chip working state; Support serial data communication interface, support three communication rates: 9600bps, 19200bps, 38400bps; Support 16-level volume adjustment; the foreground volume of playing and the background volume of playing background music can be controlled separately; The speed of words can be adjusted by sending control marks, and it supports 6-level word speed adjustment; There are multiple chord music, prompt and common voice prompts for some industry fields are solidified in the chip; Internally integrated 19 voice prompts, 23 chord prompts, and 15 background music; The final product is provided in the form of SSOP chip package; the volume is the smallest in the industry; All indicators of the chip meet the application in harsh outdoor environments; Technical indicators: 1. Supply voltage 3.3-5V 2. TTL serial port, the default rate is 9600 3. speaker interface 4. 3.5 headphone Colour:black Material:PCB Package Contents: 1 x Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.