The Power Dynamics PDM-M1204 is a simple 12 channel studio mixer with a usb player and Bluetooth receiver. You stream music from your smartphone via Bluetooth or play music from a usb stick. This allows you to easily add sound clips or listen to a well-mixed album for reference. You record sound with a studio microphone thanks to the 12 microphone inputs and 48V phantom power. You supply power to a condenser microphone via the 48V phantom power supply, so that you record sound in high quality. You add reverb or delay thanks to the built-in effects module. With these sound effects you edit the audio tracks, making the sounds fuller and mixing them easier.