Check the listing for details. [ Flyron FN-W101 ] Triggerable 10 Watts MP3 Audio Player/Wall Speaker. Condition: New. Listed at 44.99 USD. Features: Equipped with a high quality audio decoder chip that is able to decode MP3 and WAV audio formats. Built-in a 4MB flash memory by default, which is able to store a total of 4 minutes long MP3 files of 128Kbps. Works with most Windows, Mac, and Linux systems Load audio files to the internal flash memory/SD card through the micro USB port based on PC like using a USB flash drive.. 4 trigger inputs available and triggered by negative pulse/GND(low level signal). The function/trigger mode of each input can be set individually through a configuration file. Can be controlled by buttons, switches or relays. Built-in a 10Watts class D amplifier and a 5Watts speaker for great sound output. Supports max. 32GB micro SD card. Adjustable sound volume through the small blue potentiometer. Wide power input (DC9-24V) and stable performance. Dimensions: 120x120x60(mm) Electrical parameters: Working voltage: DC 9V-24V Working current: ≤400mA (Input: DC12V) Power Consumption: ≤5W Flash memory size: 4MB Audio format: MP3/WAV