Feature 1Adjustable 5-24V DC Power Supply Motor Speed Controller. 2Security, good performance, high reliability, Good anti-jamming performance. 3Has good insulation performance, low operating temperature, long service life. 4Made of environmentally friendly materials, strong and durable. 5Manual/stepless speed regulation, equipped with a large knob to adjust the voltage fast and conveniently. 6Multi-function regulating voltage switch is generally applicable to LED light, water pump, electric drill, small fan, hairdressing instrument, small motor, security equipment, small household appliances, mobile hard disk, power communication, etc. Condition: Item Type: DC Speed Control Switch Material: ABS Color: As shown in the picture Size: Approx.5.5x3.5x2cm / 2.2x1.4x0.8in Weight: Approx.55g/1.9oz Modulation Mode: Pulse width modulation (PWM) type Package List 1 x DC Speed Control Switch Note 1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.