The Proel 12 Channels powered mixer has an in-built power amplifier, USB/SD, sound Equalizer Effect, Group, Auxiliary sends. Suitable for Church, Studio, Indoor / Outdoor events, etc.  (700W - 4ohms) Features : In-built amplifier Portable Mini Equalizer Master Volume control Volume control in each channel 12 microphone mouth Digital effect processor In-built portable fan for cooling heat AC power switch Headphone slot port Gain control peak level indicator Fuse holders Outputs Stereo faders Speaker Jack left and right Line input,  etc