Features 1、Using this product can perfectly replace expensive imported products. 2、The speed controller can cooperate with a variety of engines. 3、With imported spare parts production, the product is reliable and of good quality. 4、The already improved circuit is featured with higher stability and better performance. 5、100% factory thermoelectric aging experiment can give quality assurance. Specification 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 1KΩ) AUX Input Sensitivity: 148Hz / 1V., ±10Hz., Impedance: 1MΩ 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: Grounding polarity: Negative Power Consumption: 50mA Actuator Continuous Current: Minimum 2.5A; maximum 10A Speed Sensor Signal: 0.5 ~ 120 RMS Size: Approx. 15.2 x 16.5cm / 6 x 6.5in Package List 1 x Speed Controller 1 x User Manual