Check the listing for details. Electro Magnetic Chuck Controller Milling Force Add-on With LED Display 5A. Condition: New, Made in China. Listed at 240.45 USD. Function: 1. Three-position switch, the upper left is the magnetic position, the middle is the empty position, and the right side is the demagnetization position. 2. VDC is the size of the display magnet. 3. The left red potentiometer is the adjustment magnetic force, (0V-100V) 4. The yellow potentiometer on the right side adjusts the demagnetization time (9-15 seconds). 5. The right side of the boat switch is the power switch, I is open O is off. Specifications: Input Voltage: 110V/60Hz（220V/50Hz optional Please note） Output Voltage: 0-100V DC Current Capacity: 5 Amp Demagnetizing Time: 9-15 seconds Product size: 130×140×200mm / 5.1×5.5×7.8 inch Package size: 24×21×20cm / 9.4×8.2×7.8 inch Net weight: 3kg Gross weight: 3.25kg.