Features Circuit optimization design, high quality and stable performance, suitable for long term work. Digital motor speed control is noise free and vibration free, with power indicator light. 400w motor output, 90~1400rpm / 90~1700rpm speed control range, with running stop braking function. Small size, light weight, lightweight and portable, easy to carry, convenient to install, can meet your needs. UX-52 Electric motor speed controller is operable at -10 to 50°C, and can be stored at -20 to 60°C. Specification: Item Type: Motor Speed Control Material: ABS Rated Voltage: 220~230V Operating Voltage Range: ±10% Power Frequency: 50 / 60Hz ≤±2% Motor Output: 400w Speed Control Range: 90~1400rpm / 90~1700rpm Speed Change: 5% Speed Setting: Continuous Control: Electronic Speed Control Motor Electronic Valve: 0.5S Parallel Operation: Not Applicable Soft Stop/Start: None Operating Temperature: -10~50℃ Storage Temperature: -20~60℃ Suitable for Motors: Induction, Reversible Package List:1 x Speed Control1 x Line Package List 1 x Speed Control 1 x Line