It may be small, but the UB502 features the same state-of-the-art Invisible Mic Preamp (IMP) and the same Ultra low-noise (ULN) design for highest possible headroom as its larger brethren. Its one mono channel plus 2 stereo channels with a 2-band EQ on the mono channel make it ideal for use with fixed audio installations as well as keyboards, samplers and computer application. Hobby musicians and video makers will also find use for this ultra-compact mixer. UB-502 [/IMG] Used a complete total of 3 times/3 hours. I used to to mix a dual CD player. Just not interested in doing that.. $35 + Shipping. It is virtually Brand New.. All original box and packing!