Name: M3 voice playback module Model: -M3 Power supply: DC 5V 0.5A (3.5-5.3V) Standby current: 28MA Working current: 80MA (specifically related to speakers and sound volume)Trigger ports: 9. Trigger : 9 are directly triggered, 31 are triggered by single-chip encoding Trigger level: low level ( 0.8V) Speaker parameters: 0-3 watts 4-8 ohms (volume adjustable) Support maximum memory: 32G Supported playback formats: MP3, WAV Difference: This module is basically the same as the M3T module in our store. The trigger levels of the two are different. This model is a low-level trigger. Special application tips: 1. It is necessary to use this module to play a certain song when it is powered on. It is only necessary to ground the corresponding trigger port (GND) before powering on! Inspection and testing process: 1. Prepare 5V power supply, memory card, speakers, and save the memory card into an MP3 file according to the naming described above. 2. Insert the memory card, speaker, and 5V power supply according to the order (pay attention to the positive and negative poles, 5V is positive, and GND is negative). 3. Use the connecting line to trigger the connection between GND and A1, the indicator light will be off, and song 1 will be played at the same time. 4. The operation is completed. (If the indicator light flashes once and no music is played after triggering, check the file format of the memory card) DUE to Different Batches, The Apperance, Color and Printing of the Product May Be Different, which does not attract use. Colour:blue 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.