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Are you still concerned about voltage spikes damaging your equipment? This variable-speed motor controller can gradually increase the voltage, not only solving your problems but also allows you to adjust the tools power to suit your needs (Input: 110Vac, Output: 10-110V adjustable, Maximum Current: 15A). Additionally, it features a newly added USB socket with a fixed output of 5V, 1A. Being used in the woodworking industry, industrial experiments, heating, ventilation, and air conditioning systems. The maximum power for inductive loads such as electric drills and small planers is 1650W; for resistive loads like electric stoves and heating coils, the maximum power is 5000W