Banggood Dear zygried14, Thank you for choosing Banggood and sorry for your any inconvenience came up with the product. If there is anything about the items quality problem,you can contact us via this link:http://www.banggood.com/Contact-Us_hi111, and we will give you a good solution. Best regards! Banggood Team

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Tobillo youneed to turn off your coils when it is not in use. If you using Arduino

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