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PREMIUM QUALITY – This voltage transformer with built-in high-quality pure copper coil sufficient materials good conductivity strong impact resistance constant use stable operation longer service life and more durable. HIGH PRECISION – The variable AC voltage regulator adapts axle design and the debugging is accurate the voltage range is 0-130V. There is a User-friendly design and users can adjust according to their own needs; the pointer dial the scale display is more precise the font is transparent and without fading and it is safer to use. PROTECTIVE CONVENIENT – This variable power supply features over-voltage protection higher safety reliability durability independent switch easy to use and convenient. The machine is equipped with a power cord plug and play. FAST HEAT DISSIPATION – The variac variable transformer is designed with many small holes for heat dissipation when the machine is running. It can quickly and efficiently dissipate heat without excessive temperature which will not damage the transformer. MULTIPLE APPLICATION – The variac transformer can be widely used in industries scientific experiments public facilities and household appliances. It is suitable for home coffee roasting motor speed control and label printing machine test for railroad switching power supplies.