Features
1. Adopts exquisite ABS plastic enclosure
2. Built-in a high quality audio decoder.
3. Equipped with a 4MBytes flash memory that supports max. 4 minutes long MP3 files (at 128Kbps).
4. Load MP3 files to the internal flash memory easily through the micro USB port on computer.
5. Supports 3 types of trigger modes, and each mode can be set through a configuration file.
6. 4 trigger inputs available and able to play back 4 sounds one-on-one by negative trigger / negative pulse / GND.
7. Equipped with a 3 watts speaker with loud sound volume.
8. Adjustable sound volume and wide range power input. 
9. Two colors (black and white) available.
10. Portable design and easy to install.
11. Dimensions: 70mm (diameter) x 20mm (height)

Technical Parameters
1. Working voltage: 6V-30V DC
2. Working Current: 500mA
3. Standby Current: 10mA
4. Power Consumption: ≤3W
5. Flash Memory Size: 4MBytes
6. Audio Format: MP3 (32Kbps-192Kbps)