4-channel DJ mixer with FLANGER effect and USB connectivity. I haven't tested it recently, but it worked fine the last time I used it. I purchased it new and only used it at home. No pets, and I don't smoke. This listing includes the mixer, power cable, and original box only. - Model Name: DJM-900NXS2 - USB Connection: Yes - Effect: FLANGER - Number of Channels: 4 - Headphone Jack: Yes Thank you for looking.