1. Adopts exquisite plastic enclosure. 2. Built-in high quality audio decoder. 3. Built-in 128MB flash memory. 4. Built-in 5W 8ohm speaker. 5. 5 trigger inputs available and they can be connected to as many as 5 buttons/switches/relays, etc. Supports 8 types of trigger modes and each trigger mode can be set easily through the dip switch. Supports playback of max. 31 audio files through combination of the I/O ports. Upload audio files by connecting the type-C USB port to computer with a USB data cable.-No need any program/software. The internal memory be detected as a USB flash drive on computer. Sound volume is adjustable through turning the potentiometer. to drive an external equipment like a warning light or a motor simultaneously through VCC output when it is playing a sound. Equipped with a 3.5mm audio output jack that can be connected to an external amplifier or a headphone. Industrial grade design and strong anti-jamming capability. Working voltage: 10-30V DC Working current: ≥1000mA Power consumption: ≤5W Flash memory size: 128MB Audio format: MP3 or WAV Color: White Material: plastic Package Contents: 1 x Embedded Audio Player Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.