This is an old Alesis Studio 32 Mixer from the late 90s (maybe early 2000s). It is a full featured studio worthy mixer with 16 Mic/Line inputs each with direct outs for recording, inserts for external gear, 16 tape returns for mixing out of the box, 4 subgroup busses and 6 auxes for monitor mixes. Each channel has a 3 band EQ with fully parametric mids. It comes with rack ears so it can be mounted in a standard 19" rack which is super handy if you're running a mobile recording rig or PA. Check out the Sound on Sound review here for more info: https://www.soundonsound.com/reviews/alesis-studio-32 I've tested all the mic pres, EQs, main outs, and aux outs. There are a few scratchy buttons/pots but everything I've tested has worked but a little electronic cleaner wouldn't hurt.