DC12V-24V LED Dimmer Switch ON/OFF Rotary Control Switch for Dimmable Lights Description Optimal Dimmability: Noiseless and flicker-free when dimming, offers a uniform dimming range from 3% to 100%, inline LED dimmer switch is perfect for dimmable LED strips and dimmable halogen strips. Eyes Protection: Excellent quality. Dim the lights 3% - 100% to let your eyes gradually adapt to bright light or darkness; reduce eyestrain and protect your eyes from overly bright lights. Energy Savings:Works with Vin: DC 12V-24V LED:12-24V 5A 120W Max, 10A high current push switch, dimming range 3-100% to cut energy costs and extend bulb life. Wide Applications:Commonly used for lights in RVs, Camping Trailers, Caravans, Boats and anywhere 12V-24V DC power is present. Fits in small spaces. !!! It cannot be used for inductive transformers, fan and motor speed control.. Note:  Before purchasing the 12v dimmer switch, please confirm whether your LED light is marked as "dimmable".  If it is not, you cannot use this dimmer for dimming, you can only turn on/off the lamp or the lamp flickers.