Features Genuine ALPS motorized potentiometer attenuator from JAPAN,Durable and reliable Works more like a stepped potentiometer, Move a step when pressing volume button each time,Easy to set the volume. Volume auto adjustment after power on, Turn to minimum when power on then set at 9 clock,To make sure that volume is not too loud With LED indicator to show working status The PCB is compatible with unblanched and balanced/XLR input, The default volume potentiometer is for unblanched application,Pls contact us if you want balanced pot. Specifications Resistance: 100K Ohm Shaft length: 25mm PCB size: 80mm*50mm Size of remote control: 90mm*40mm Power supply: AC or DC 9V Packing List One volume control board with ALPS motorized potentiometer One remote control (battery not included)