Native instruments - Audio 4 DJ Audio Interface
Comes with 6 month warranty.

Native Instruments Audio 4 DJ Main Features Include:
4 Channel Hi-gain Inputs/Outputs (1/4" Jack/Phono)
Powered By: USB 2.0 Connection
1/4" Headphone Jack with an Independent Volume Knob
8 Status LEDs
Super High-end Cirrus Logic® AD/DA Converters
Included NI Software: Traktor 3 LE, Traktor Pro (Demo), Kore Player and Kore Soundpack
Supported Drivers: ASIO, Core Audio, DirectSound
Dimensions: 4"(101 mm) x 4.8" (121 mm) x 1.7"(42 mm)
Sample Rate: 44.1, 48, 88.2, 96 kHz
Bit Resolution: 16, 24-bit
Headphone/Line Frequency Response: +/-1 dBu: 10 Hz-40 kHz
Weight: 1.1lb (511 grams)

Native Instruments Audio 4 DJ System Requirements:

Windows: Windows XP Pentium or Athlon 1.4 GHz, 512 MB RAM, USB 2.0 port, Service Pack 2
MAC: OS X 10.4, G4 1.4 GHz or Intel Core Duo 1.66 GHz, 512 MB RAM, USB 2.0 port