12-channel mixer with ALT, install standard 19-inch cabinet, whole block double circuit, no connecting fault. SMT, more reliable with 4 or 8 mono in-out, 4 stereo input, 4 fold back input. Left and right main output, two-bus output with 2 aux sending, one is after the push bar. Monitor function, for all input and output. Independent switch for each +48 phantom power with LED DJ light.