Features: Powerful Carrying : Supports up to 8A current, suitable for a wide ranging of devices, including air model water pumps and other electric motors. Wide Voltages Ranging: 3V to 30V voltages, flexibly adapting to a variety of power supply requirements to meet different application scenario. Precise PWM regulation: Equipped with precise pulse width modulation (PWM) function, it realizes smooth speed and power control and improves the stability of equipment operation. Easy to install and use: Simple wiring design facilitates users to quickly access various control without complicated adjustments. Highly temperature resistant designs: Ensuring stable operates under high load conditions, prolonging product life. Specifications: Current 8A PWM Voltages Ranging: 3V to 30V Support Precise PWM regulation Length:about 10cm/3.94in Quantity： 1PC/10PCS Package Includes: 1PC/10PCS Water Pump Switches note: Due to the problem of lighting effect, there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurment.