Built-in a high quality MP3 player with great sound quality. 

Built-in 4MB flash memory as the storage device. 

Easy to take off the lid and put it back. 

Easy to update sound file on computer through USB connection. 

A push button is connected to the speaker. 

It will play a sound after pressing the push button. 

With the self reset button (green), it also supports multiple sound files other than one sound file only. -When there're multiple sound files, it will always play the next sound file after short pressing the button. 

With the seft-locking button (red), the sound file is always played in a loop until the button is pressed again
and released. 

Equipped with a high quality class D amplifier. 

Adjustable sound volume through turning the blue potentiometer on the internal circuit board. 

Wide power input and stable performance. 

Length of the power wires: about 30cm

Length of the button wires: about 20cm

Features:

• Working voltage: 6V to 30V DC
• Working current: ≤1000mA
• Power consumption: ≤3W
• Flash memory size: 4MB
• Audio format: MP3
• Sound pressure level: ≤100dB