This volume controller is specially designed for public address system and is suitablefor all locations.1)ITEM MODEL:VC-065ED3;2)INPUT CAPACITY:3W3)MODALITY:Resistor4)VOLUME STEP QTY:5 Steps(OFF,-18dB,-12dB,-5dB,0dB);5)FORCED-SWITCH MODE:3-Wire6)BOTTOM BOX DIMENSION:50X97mm