This is the latest all-in-one unit, the OPUS QUAD, from AlphaTheta Corporation. Like the CDJ3000X, it supports streaming via Wi-Fi. I have been using it for about a year. It has only been used indoors and has not been taken outside. Operation has been checked. There are no issues with the buttons or faders. It is a good product with the original box and all accessories. A 4-channel DJ controller with touch-sensitive platters. - Type: DJ Controller - Color: Black - Number of Channels: 4 channels - Number of Faders: 2 faders - Display: LCD display - Platter Type: Touch-sensitive - Effects: Equipped with multiple effects - Connection Terminals: USB connection Thank you for viewing.