1. Built-in a high quality MP3 player with 8MB flash memory.<br>2. Supports inserting USB flash drive and micro-SD card as the extended storage devices.<br>3. Supports max. 32GB USB flash drive and max. 32GB micro-SD card.<br>4. 7 trigger inputs available and they can be connected with as many as 7 push buttons/switches/relays, etc.<br>5. Built-in a 50Wx2 class D amplifier and the audio output is powerful.<br><br>Uploading audio files by connecting the micro-USB port of the device to computer with a USB data cable.<br>Sound volume is adjustable through turning the volume knob.<br> to drive an external equipment like a warning light or a motor simultaneously when it is playing a sound.<br>Equipped with a 3.5mm audio output jack that can be connected to an external amplifier or an active speaker.<br>Adopts solid and aluminium alloy case.<br>Industrial grade design and strong anti-jamming capability.<br>Working voltage: 12-24V DC<br>Working current:8500mA 12V (when it has two 50W speakers),4250mA 24V (when it has two 50W speakers)<br>Power consumption: 100W<br>Flash memory size: 8MB<br>Audio format: MP3<br>8 Type Trigger Modes<br>Specification:A:Positive Trigger Ver<br>Color: Black<br>Material: plastic<br><br>Package Contents:<br>1 x 7 Triggers Audio Player<br><br>Only the above package content, other products are not included.<br>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.