Features 1、Speed Control Knob: This knob can adjust motor speed, easy to use 2、Clear operation panel and dial, the pointer can point speed accurately 3、When the load is fan or pump, the power saving effect is remarkable 4、With IP5X dustproof class, can be used for panel embedded or wall mounted, bottom incoming wire 5、Used for speed control of electromagnetic asynchronous motor (slip motor), realizing stepless adjustment of constant torsion Specification Features: Speed Control Knob: This knob can adjust motor speed, easy to use. Clear operation panel and dial, the pointer can point speed accurately. When the load is fan or pump, the power saving effect is remarkable. With IP5X dustproof class, can be used for panel embedded or wall mounted, bottom incoming wire. Used for speed control of electromagnetic asynchronous motor (slip motor), realizing stepless adjustment of constant torsion. Specification: Input Speed: 1rpm Output Speed Range: 1 Field Current: 5A Mounting-hole Size: Approx. 192 x 132mm / 7.6 x 5.2inch Product Size: Approx. 210 x 150mm / 8.3 x 5.9inch Weight: Approx. 944g / 33.3oz Optional Model JD1A-11 JD1A-40 JD1A-90 Speed Adjustable Range 125-1250RPM 132-1320RPM 440-1320RPM Control Motor Power 0.55-11kW 15-40kW 45-90kW Max Output DC 90V 3A DC 90V 5A DC 90 8V Speed Variation Rate ≤3% Steady Speed Precision ≤1% Input Voltage AC 200-240V Package List: 1 x Electromagnetic Motor Speed Controller 1set x Accessory Package List