This audio player, called Microsound.  Audio will playback automatically after the PIR sensor has been activated.

The audio files can be replaced by yourself. For example, used as a doorbell, when customer enter the door, it can say "Hello, welcome". 

Application:

• Create an audible warning for a restricted area.
• Audible security alarm.
• Create a special door entrance greeting.
• Raise attention and create impact by adding a speech, music or sound effects to a point of sale display.

Features: 

• MP3 audio format.
• Two levels volume for option, small or maximum.
• Human body induction, induction range within 4 meters.
• Built in 32Mbit(4MByte) flash memory.
• Play modes: single play, sequential play.
• Audio files can be replaced by yourself.
• Can download audio files directly from computer.

Parameters:

• Power Supply: 3 AAA batteries or USB power, DC3V~ 5V
• Working Current: Sleep mode ≤100uA; Playing mode ≤130mA
• Audio Format: MP3, Bit Rate: 8~320Kbps
• Audio Output Power: 8Ω/1W
• Infrared Induction Range: ≤4m(120°angle)

How to update audio files? 

1. Convert the voice into MP3 format.
2. Connect player to computer by USB cable. There will be a removable disk appearing on computer. 
3. Format the "removable disk".
4. Open that removable disk, then copy files to this disk.

Note: Before copying, delete all Manufacturer's files frist, then copy your own files to this device.