1. Built-in high quality audio decoder with 8MB flash memory. 2. Supports inserting USB flash drive and micro-SD card as the extended storage devices. 3. Supports max. 32GB USB flash drive and max. 32GB micro-SD card. 4. 10 trigger inputs available and they can be connected to as many as 10 buttons/switches/relays. 5. Also can be triggered by a PLC or an industrial controller sending level signals. Supports 10 types of trigger modes and each trigger mode can be set easily through a text document. Built-in high quality speaker and the sound is loud and clear. Uploading audio files on computer through connecting the micro-USB port of the device to computer with a USB data cable. Sound volume is adjustable through turning the potentiometer. to drive an external equipment like a warning light or a motor simultaneously when it is playing a sound. Equipped with a 3.5mm audio output jack that can be connected to an external amplifier or an active speaker. Adopts solid and aluminium alloy case. Industrial grade design and strong anti-jamming capability. Working voltage: 12-40V DC Working current: 1000mA Power Consumption: 10W Flash memory size: 8MB Audio format: MP3 or WAV (less than 16bit) 10 Types of Trigger Modes Specification:A:Negative Trigger Ver Color: As Shown Material: Aluminum Plastic Package Contents: 1 x 10 Input Channel Triggerable MP3 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.