rekordbox allows DJs to prepare more before their performance and opens a door to tools such as Quantize for perfectly synced loops every time.DJs can then export data to a USB device to access vast libraries of music files and perform live - without the need for extra equipment or any inconvenient rewiring in the club.Through the industry-first Pro DJ Link, music files and database data on one single USB device can be shared simultaneously by up to four players connected via LAN (local area network) cable, or with one LAN cable between two players. Plus, the data history of each DJ set is automatically saved and can be made into a playlist that can be loaded back into rekordbox.Another key facet of the CDJ-900 is its advanced HID (human interface device) and MIDI capabilities for native control of DVS (digital vinyl systems) via USB.There is also an improved audio output circuit, a new Wolfson DAC processor, and a built-in 24-bit/48 kHz sound card.Add to these features an overall enhanced design that includes a new display screen, rotary selector, carry handles and Kensington lock.Then check out the four-beat Emergency Loop and the three CDJ-900 exclusives: the Auto Beat Loop, Quick Return scratch feature and a Slip mode that enables DJs to perform tricks and return to their original flow in an uninterrupted fashion and you have the perfect tool for maximum performance.I SHIP PRIORITY MAIL USPS. 1-3 BUSINESS DAYS HANDLING TIME. I DO NOT ACCEPT RETURNS, HOWEVER CUSTOMER SATISFACTION IS OUR PRIORITY SO IF YOU HAVE ANY ISSUES PLEASE MESSAGE ME AND WELL COME TO A RESOLUTION. IF WE DECIDE ON A RETURN, THE BUYER WILL PAY RETURN SHIPPING AND A 18% RESTOCKING FEE OF THE ITEM PRICE.DO NOT RETURN ITEM UNLESS YOU GET APPROVAL FROM ME. PAYMENT IS DUE RIGHT AWAY, REGARDLESS IF YOU OFFERED A PRICE AND WE ACCEPTED, YOU MUST PAY RIGHT AWAY.IF WE DONT RECEIVE PAYMENT WITHIN FIVE HOURS OF SELL WE WILL RELIST IT AND CANCEL SALE .BEFORE YOU MAKE AN OFFER NOTE THAT WE HAVE THREE DAYS TO RESPOND SO MAKE SURE YOUR WILLING TO ACCEPT IT IF WE RESPOND AND TAKE THE OFFER ON THE THIRD DAY.