5-12V 1A Manual 2-3 Wire Fan Speed Regulator Noise Reduction Shutdown With Knob Features: 1. Single function 2-3 wire manual speed controller with switch can control 5-12V 0.1-1A fan, can not be used for 4-wire fan speed control oh. 2. Smooth DC output, good control effect, no high frequency whistling sound fan! 3. Adjustable starting speed, easy to use and good results. 4. Do not control the fan more than 1A! 5. Do not connect the wrong or reverse power supply! Do a good job of insulation to avoid output short circuit! Specification: Operating voltage: DC5-12V (withstand voltage range 4.7V-14V) Fan current: 0.1-1A (fan current below 0.1A control effect is slightly worse, super 1A may damage the circuit) Circuit board own loss: less than 30mA without fan connection Starting position adjustment range: 0%-60% (internal circuit control parameters) Output interface type: 2510-3P, pitch 2.54mm, regular CPU, chassis fan socket Circuit size: Circuit board 42mm * 20mm knob screw out 15mm installation openings 7mm Package Included: 1*Fan Speed Regulator Note: 1. Due to manual measurement, please allow 1-3mm error. Please make sure you don't mind before ordering. 2. Please allow 1-3g weight error. Please make sure you don't mind before ordering. 3. Due to different lighting of photos and differences in monitors, the pictures may not reflect the actual color of the object. Please make sure you don't mind before ordering, thanks!