A. Introduction to Motor Speed Controller # Product Parameters 1. Working voltage range: AC 110V to 220V 2. Model: BTA41600B 3. Maximum power: 4000W (when connected to a resistive load) 4. Long - term operating power: 3000W 5. Starting voltage for voltage regulation: 10V 6. Adjustable voltage range: 10 - 220V 7. Protection functions: Lightning protection, surge protection, RC absorption (EOC) B. # Product Features 1. Durability: The high - power motor control module adopts a double - insulation design, so there might be no leakage even in case of short - circuit or burnout. 2. Protection mechanism: The motor regulator is equipped with lightning and surge protection functions. The design of the RC absorption circuit and the fuse can further enhance the safety of use. 3. Aluminum housing: The motor speed controller is equipped with an aluminum housing to prevent it from being easily damaged; the filled tin can avoid heating under high - current conditions. 4. Wide range of applications: This motor speed controller can be applied in areas such as heat regulation of electric furnaces and water heaters, dimming of lighting fixtures, speed regulation of small motors, and constant - temperature control of electric irons. C. # Instructions for Use 1. When connecting, it is necessary to first connect the load and then make adjustments. When using it for the first time, turn the potentiometer counter - clockwise to the end before turning on the power. Otherwise, when connecting a load such as a small - resistance wire, the device is likely to burn out after power - on. 2. This product is mainly used for resistive loads (such as wires, incandescent lamps, etc.). Most single - phase AC motors can also be used. Please confirm the applicability of other types of loads before purchasing. 3. Connect the output end of the adjustable power supply board to lighting fixtures, household appliances, or circuits, input 220V AC power, and then turn the knob to perform dimming, speed regulation, voltage regulation, and temperature control. D. # Product Specifications 1. Color: Blue + Silver 2. Material: Metal 3. Dimensions: 85x55x38mm E. # Package Contents One motor speed controller F. **Precautions** 1. Due to the influence of light and different monitors, the actual color of the product may vary slightly from the picture. 2. The allowable measurement error is ±1 - 3cm, and only the above - mentioned package contents are included, and other items are not included.