Feature: 1. Imported Chip: With built in imported chip, the DC motor speed controller has an accurate and stable operation. Use it with confidence! 2. Self Recovery Fuse: Overcurrent disconnects the fuse, and automatically recovers after a few seconds of cooling, the auto recover function of the fuse is very convenient and saves time and effort! 3. Main Application: This DC motor controller operates smoothly with no noise no vibration,with power indication,wide duty cycle adjustment range. 4. Large Controllable Space: 0‑100% stepless speed regulation allows you to have greater control over the process of using your equipment. Very convenient! 5. Small Size: This DC motor speed controller is small in size, convenient for your installation and carrying. Specification: Item Type: DC Motor Speed Controller Default Working Voltage: DC 5V-35V Non Default Two Point Short Circuit Working Voltage: DC 3V-15V Control Power: 90W (Peak) Quiescent Current: 0.015A (Standby State) PWM Duty Cycle: 1% - 100% PWM Frequency: 10KHz. Package List: 1 x Motor Speed Controller