Voice Record Module is a multiple‐message record/playback device based on ISD1820 Chip. It offers, no‐volatile storage, true single‐chip voice recording and playback capability for 8 to 20 seconds.  This module has On-chip 8Ω speaker driver with Push-button interface. It is easy to use with high quality natural voice restored feature. It can be used in Automobile car bug, parking radar, Voice in medical devices, Elevator, toys and many more. This module can be controlled either by MCU or manually.

MP3 Module is used in car navigation voice broadcast, road transport inspectors, toll voice prompts,electric power, telecommunications, financial operating room voice prompts,multi-channel voice alarm or voice guidance equipment operation,fire alarm voice prompts.fully supports FAT16, FAT32 file system, maximum support 32G TF card, support U disk to 32G, 64M bytes of NORFLASH with ,30 level adjustable volume, adjustable EQ 6 the audio data is sorted by folder, supports up to 100 folders, folders can assign every 255 tracks the broadcast language spots feature, we can pause the background music being played. Advertising finished playing back background sound to continue playing.

Microphone  Module is a sensor used for sound detection with  mounting screw hole contains digital threshold comparater sound detection module has two output AO, analog output, real-time output voltage signal of the microphone DO, when the sound intensity reaches a certain threshold, the output high and low signal and Adopts LM393 main chip.

Microphone is small SparkFun Electret Microphone  that  eliminates the need for a polarizing power supply by using a permanently charged material it is Small electret microphone Useful in acoustic and audio applications it amplify the sounds of voice, claps, door knocks or any sounds loud enough to be picked up by a microcontroller’s analog-to-digital converter translates amplitude (not volume) that captures  sound waves between two conducting plates.