Stepless speed regulation function enables speed regulation for angle grinders, marble machines, exhaust fans, electric heaters, and other power tools and home appliances. It also supports voltage and power regulation for electric heater resistors, motor fans and other devices, and adjusts brightness, temperature and other parameters. ABS flame-retardant housing provides high-temperature resistance, compression resistance, and high insulation properties. It comes with overload and short circuit protections, built-in overload and independent switch to control input and output voltage, replacing boat switch and fuse, and preventing equipment damage caused by overload or short circuit. Equipped with a potentiometer regulator system, which ensures accuracy and stability of voltage regulation. A high-precision voltmeter displays output voltage in real-time, so that users can grasp the working status of the equipment. 4000W high power design meets the use of various types of high power devices. A precise potentiometer regulator achieves speed regulation via turning the regulator, with energy saving performance, and practical operation. Compact model, easy to carry. Designed with a hook buckle, which enables operators to hang it on toolkits or tool belts when using angle grinders to improve efficiency. This angle grinder speed controller is a versatile electronic voltage regulator and speed controller. With stepless speed regulation function, it enables speed regulation for angle grinders, marble machines, exhaust fans, electric heaters, and other power tools and home appliances. It also supports voltage and power regulation for electric heater resistors, motor fans and other devices, and adjusts brightness, temperature and other parameters. With functional compatibility, safety protecting mechanism, precise voltage regulation capability, and humanized design, it is a cost-effective and practical speed controller product. Stepless speed regulation function enables speed regulation for angle grinders, marble machines, exhaust fans, electric heaters, and other power tools and home appliances. It also supports voltage and power regulation for electric heater resistors, motor fans and other devices, and adjusts brightness, temperature and other parameters. ABS flame-retardant housing provides high-temperature resistance, compression resistance, and high insulation properties. It comes with overload and short circuit protections, built-in overload and independent switch to control input and output voltage, replacing boat switch, and preventing equipment damage caused by overload or short circuit. Equipped with a potentiometer regulator system, which ensures accuracy and stability of voltage regulation. A high-precision voltmeter displays output voltage in real-time, so that users can grasp the working status of the equipment. 4000W high power design meets the use of various types of high power devices. A precise potentiometer regulator achieves speed regulation via turning the regulator, with energy saving performance, and practical operation. Compact model, easy to carry. Designed with a hook buckle, which enables operators to hang it on toolkits or tool belts when using angle grinders to improve efficiency. Products inside the circuit board and capacitive electronic elements can not be used compatible with bedside clip fans, miniature fans, small ceiling fans, LED energy-saving lamps, microwave ovens, induction cookers, washing machines, rice cookers, aquarium pumps, brushless synchronous motors and so on. Name: Electronic Voltage Regulator Material: ABS Maximum power: 4000W (load power 2000W) Maximum current: 10A, 15A (optional) Item size: 120 * 65 * 55mm / 4.72 * 2.56 * 2.17in Package size: 145 * 120 * 115mm / 5.71 * 4.72 * 4.53in