Check the listing for details. Switch Variable Speed Controller 10- Switch Regulation Motor Speed Controltx0h3n. Color: Black, Condition: New. Listed at 6.64 USD. DESCRIPTION:Condition: 100% NewColour: As the picture shown Description: Electronic governor: 12V, suitable for lights dimming, pump regulation, fans wind speed, heating , equipment power, motor rotate speed. Durable: Using pure copper thick wire, more safe and stable, waterproof and durable. Easy : With temperature control knob, 10% - 100% adjustable and closed. Advntage: Silent work, energy saving, stable anti noise, and with of use. Wide Application: Connect this device appliance , then rotate the knob for dimming, speed, voltage, temperature control. Specification: Material: Copper Operating voltage: 10- Control power: 25W Adjustment range: 10%-100% (can be shut off) Size:approx. 42x21x16mm/1.65x0.83x0.63inch Package Includes: 1 Piece Speed Controller Note: Don brushless type motors. NOTE:1. Due to the hand measurement, there may have error measurement about 1-5mm.2.Item color displayed in pictures may be showing slightly different on your computer monitor since monitors are not calibrated same.Your understanding will be highly appreciated.SHIPMENT:1.Buyer take responsibility in import / tax cost (not included in item price)2.Pls contact with us to confirm extra cost if you need to upgrade the shipping option3.If theres any concern about shipping, pls contact with us for further confirmation RETRUN POLICY: -30 DAY MONEY BACK RETURN POLICY： 1. If you are unhappy with your item or changing of mind purchases for whatever reason, pls keep the item and package original. Buyer needs to afford the return postage. Besides, original postage will not return.2. Please contact us within 30 days if you have a faulty item and we will cover the return postage where necessary, we do not cover this outside 30 days of purchase.-ADDRESS CHANGES: 1. If you enter the incorrect name or shipping details before purchasing, we will arrange shipment for you according to your ebay address.2. We are not responsible for these changes if there is a mistake entered by the buyer. CONTACT US:1. Our working time is from Beijing time 9:00am to 18:00pm on working days.2. We hope to give you a good shopping experience. We will glad to help you solve problems once we receive your letter on working time.3. If you have any questions or advice about the product you receive, pls contact us and send the pictures about the item firstly, we will check the issue for you ASAP and make you sastified.