Additional Details ------------------------------ Product description: The Behringer Micromon MA400 Ultra-Compact Monitor Headphone Amplifier features XLR Thru jacks and provides superb noise-free operation. Connect mic to the Mic Input and send a line from the Mic Thru to your main mixer. You can even use studio-grade condenser mics, as the MA400 will pass +48 V phantom power, if mixer is so equipped. The Phones jacks accept both 1/4" and 1/8" headphone and earbud connections, making the MA400 ideal for hardwired IEM (in-ear-monitor) applications, such as singing drummers and keyboardists. The MA400 comes with a dedicated 12 V DC power supply and an LED to indicate when it is powered up. Masterful Monitor Mixing Capable of stereo or mono operation, the MA400 is a powerful little mixer that allows to control two independent sources, a microphone and the monitor feed from your main mixer. Simply adjust the Mon Level control to a comfortable setting and then dial in all the "me" you want with the Mic Level control. Directions: The Micromon MA400 is a personal monitor mixer for performers. It features flexible Mic In and Mic Through XLR connectors with a Ground Lift switch. It also has a stereo Monitor input with a dedicated Monitor Level control and Mono/Stereo switch. The high-power headphones output is available on 1/4 in. and 1/8 in. jack connectors. The product is small enough to fit in your pocket, making it ideal for performers who need a personal monitor mixer. It includes a DC 12-Volt adapter and is made of high-quality components for long life.