The Vonys STM-2290 is a 4-channel mixing console with a USB port and Bluetooth for amateur DJs. You can play back MP3s from your smartphone or tablet thanks to the Bluetooth connectivity. Prefer to play your own music from a USB flash drive? The USB port allows for you to do this. In order to mix music just like a DJ, you can connect a CD or record player to the design. The players let you adjust the speed of 2 tracks so you can synchronize them. This lets you prepare a smooth mix transition. If you want to shout something through the mic, you can connect a microphone to the 6.3mm port.