Alesis Strata Prime Electronic Drum Set BONUS PAK Bundle Uniform half cardioid polar pattern for KAW ES920WCHP Uniform half cardioid polar pattern for maximum gain before feedback and rejection of off axis sound 16 pads: multi function RGB performance pads not only let you accurately capture percussive playing The tension can be adjusted on all six mesh heads so you can set the exact level of rebound and expressiveness to your preference and unnatural ‘hotspots’ on the heads are eliminated by Alesis’ unique patented anti hotspot sensor design* Magnetic position sensing ensures that pedal movements are translated with extraordinarily high resolution