The rotaries and crossfader in the middle section are plastic, but feel solid enough.

ENGADGET: PDJ Portable Disc Jockey is a complete DJ system that fits in your pocket, we go hands-on (video)

Its two channels each have a volume slider, EQ controls and LED meters, plus a crossfader adjusts the level between the channels.

ENGADGET: IK Multimedia's iRig and iKlip STUDIO mobile peripherals learn to play nice with Android, stay friends with iOS

The tempo, deck, and crossfaders are also built with different levels of resistance depending on their function (the crossfader has the lightest touch, as you'd probably guess).

ENGADGET: Native Instruments Traktor Kontrol S4 review Alt