PIONEER DVR-A07XLB Internal DVD +/- Writer (Black) Ultra Dynamic Resonance Absorber - stabilizes imbalanced media and absorbs vibration, which reduces noise & provides higher quality writing Liquid Crystal Tilt Compensator - this handy feature provides accurate read/write performance when you encounter irregularly curved, or thick/thin media. Up to 4x recording on DVD-RW & DVD+RW media Up to 24x recording on CD-R & CD-RW media Up to 12x DVD Read