Feature: 1. [Real Time Voltage Display] This speed controller features a display that shows the real time output voltage, making the working voltage of the machine clear at a glance. 2. [Automatic Shutdown Protection] The switch automatically cuts off power when the instantaneous current exceeds 10A, ensuring safety during operation. 3. [Convenient Indicator Light] The speed regulator comes with indicator light, providing a visual cue and indicating the operational status for added convenience. 4. [Multi Functions] This electronic voltage regulator has versatile applications, including speed control, voltage regulation, temperature adjustment, light dimming, and more. 5. [Safe Material] Made with premium PC shell, this speed controller is hard wearing, heat resistant, flame retardant, reliable for long term use. Specification: Item Type: Motor Speed Controller Material: PC Current: Maximum 18A (Overload Protection 10A) . Package List: 1 x Motor Speed Controller 1 x User Manual Note: 1. The peak power of this product module is 4000W. Connected Electrical Power: Resistive Load: Maximum power shall not exceed 2000W; Inductive Load: Maximum power shall not exceed 500W; Capacitive Load: Maximum power shall not exceed 300W. Otherwise the product may be damaged. Speed regulation of fans with a power of over 550W should have a minimum speed of half. For appliances with a power of over 1000W, when not in use, turn the knob to 0 to avoid excessive current during the next startup and damage to the regulator.2. The input voltage of this product is AC voltage, and the output is AC voltage. The maximum input value is equal to the maximum output value. It can reduce voltage and power, but it does not have a boosting function. It is not suitable for applications that require very precise speed or very low speed. 3. Intelligent appliances with circuit boards and other electronic components cannot be used (such as household water pumps, induction cookers, rice cookers, ordinary LED energy saving lamps). It can only adjust most of the fans and brushed electric tools, and cannot adjust other motors separately. If there are already gears or high low speed wires in the motor, humming AC frequency noise or no speed regulation effect will occur when connecting the regulator. 4. Beware of kids contact, keep away from fire sources, and do not insert foreign objects other than plugs into the sockets. 5. This product has no waterproof function and is only used in dry indoor environments. Be careful not splashing water when using in damp places such as bathrooms, kitchens, and fish tank.