Using this product can perfectly replace expensive imported products. The speed controller can cooperate with a variety of engines. With imported spare parts production, the product is reliable and of good quality. The already improved circuit is featured with higher stability and better performance. 100% factory thermoelectric aging experiment can give quality assurance. Item Type: ESD5221 speed controller. Speed Stability: Better than ±0.25% Speed Range: 1KHz 7.5KHz Thermal Stability: Maximum ±1% IDLE Adjustment: 160±20Hz 95% of rated speed DROOP Adjustment: Minimum position: 15Hz±6Hz / load current change per ampere Maximum Position 400Hz±75Hz / load current change per ampere External Speed Adjustment: ±200Hz (external 1K?) AUX Input Sensitivity: 148Hz / 1V. Impedance: 1M? START FUEL Adjustment: 160±20Hz 70% of rated speed RAMP Time Adjustment: 1.5 20Sec. 10V Output Current: Maximum 20mA Surroundings: Operating Temperature Range: -40? 85? Operating Humidity Range: Maxism 95% Storage Temperature: -55? 90? Vibration: 20-100HZ 500mm/Sec. Input Power: Power Supply Voltage: 12V and 24V DC battery system Grounding polarity: Negative Power Consumption: 50mA Actuator Continuous Current: Minimum 2.5A; maximum 10A Speed Sensor Signal: 0.5 120 RMS. 15.2 x 16.5cm / 6 x 6.5in. 1 x User Manual. The above performance parameters are measured at the working frequency of 4000Hz. Our listing price includes the value of goods, packaging cost, and export. Please check with your country’s. We will reply your message within 48 hours. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.