This product has been extensively tested to ensure electrical safety standards are met. his phone holder has features such as over voltage protection, overheat protection, magnetic field protection, short circuit protection, it will automatically stop working if the device fails. This holder uses infrared sensing technology with a range of 10 cm. When the smartphone is close to the detection area, the Induction Holder will automatically open and the smartphone will be fixed. If you tap the left metal button lightly, the Induction Holder will be released automatically. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.