Nady MM-141 4-Channel mono unbalanced Mini Mixer – ¼” Inputs & output – Portable - Battery powered or use optional AC adapter …;

The affordable NADY mm-141 4-channel mini mixer features 4 mono 1/4" inputs with individual volume controls and 1/4" unbalanced output with Master volume control to give you exactly what you need with no fat. Up to 20dB of output gain and an s/N ratio of only 87dB combined with a frequency response of 10Hz to 100kHz make this NADY mixer studio friendly. Power on/off switch with LED indicator. The mm-141 mini mixing console operates at 9V DC from a battery or optional external power supply.