Models RK1681 / MG0 and RK2711 MC0 are Motor driven. 27mm Dual Potentiometers. Brought to you by Alps, RK27 Series of dual potentiometers are a high quality with a rugged construction and smooth operation. The RK27 Series potentiometer is particularly suitable for professional hi-fi equipment. Features and Benefits:. PCB or panel mountable End slotted metal shaft Metal mounting nut and washer supplied Motor voltage: 4 6Vdc Motor current at end slip: 150mA at 4.5Vdc Gang error -60dB 0dB = 2dB max. Rotational life of 15000 Cycles Mounting bush M9 L7