MAXTOMARS&reg; N4 4-Channel Mono Unbalanced Mini Mixer 1/4" Inputs & Output Mic-Line Audio Mixing Console, AC Adapter Included, Can also use battery 4 Mono Channels Mini Mixer - four 1/4" (TRS 6.3mm) Inputs to 1 Output Mini Mixer, Simple Use, Portable & Convenient Carrying AC adapter included (US plug), Can also use 9V Battery Input 110V, 60Hz, 0.30A Max; Output 48V For Home, Karaoke, Self-made Music, Studio, Concert, Party, Bars, KTV, Meeting, Speech, etc. Comparing with other Audio Mixing Console, this one is more Lightweight & Convenient to take it anywhere