1. Speed Control Knob: This knob can adjust motor speed and display in real time. 2. It has compact size, high precision, wide speed controlling range, and long service life. 3. The controller uses high quality electronic circuit and integrated components for durability. 4. Widely used in packaging, printing, food, electronics, instruments, clothing industry production line for speed drive device. Default output: 50% Control range: 0%-100% Control accuracy: 1% Control output: SCR Output type: Direct output Rated power: 500W Power-off save: No Output voltage: AC 220V Operation: Press and hold the encoder and power on to set the minimum output; for example: output 20%, press and hold the encoder and power on to display the minimum value, adjust to the required minimum value, press the encoder again to confirm and exit. Type: ZFX-P1007A Colour: white Material: plastic Package Contents: 10 x Speed Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.