This product has soft-start function, adopts MCU digital control technology, multi-functional design, accurate bids, speed control with stable performance. Apply the digital display menu option to modify the setting quickly and conveniently. The display speed can be set according to the user's needs, and the displayed target value can be converted automatically. You can give it a try. Features: Adopts MCU digital control technology, multi-functional design, accurate speed control with stable performance. Apply the digital display menu option to modify the setting quickly and conveniently. The display speed can be set according to the user's needs, and the displayed target value can be converted automatically. It can realize slow acceleration and slow deceleration. It can be operated by a panel and controlled by an external switch. Panel knob automatically adjust to the highest speed, easy to adjust and control, safe. Locking function-Protection to prevent motor and regulator from burning out due to blocking. (this function can protect against locked rotational overload, but cannot protect against non-locked rotational overload)Increase the workflow function. Specifications:Name: speed controllerModel: UX-52Main color: blackVoltage: 220VCudniction frequency: 50/60HzMotor power: 400W Product size: 100*90*60mm/3.9*3.5*2.4in Product weight: 231g/8.1ouncePackage size: 122*105*85mm/4.8*4.0*3.3in Package weight: 275g/9.6ouncePacking list:1*speed controllerMany questions about Dropshipping services are following:1. How many orders can you handle per day? We are a large company in Shenzhen, China, with a large warehouse that can handle large orders every day. We ship countless packages every day. We can guarantee the order you request.2. How fast can you process orders? We will arrange the shipment as soon as possible after you pay for your order. Priority delivery for dropshipping order3. Can you ship an order without any receipts, invoices and promotional offer inside the package? Absolutely! No invoices, receipts, promotional offer if you leave notes on the order (if you want, we can deliver.)4. If you need other products? We can supply most of the products you need as much as possible1If you have any other questions, please feel free to