How to Use : 1.Clean the surface you need to install. 2.peel the adhesive pad and apply to the suction cup carefully, remember you finger don’t touch the adhesive pad. 3.Press it at least 30 second. To ensure that the 3M strong adhesive and the contact surface are completely combined. 4.Don’t use it in 12 hours. Package Includes; 3x 3.15 inch (80mm diameter)3m heat proof double-stick adhesive backing. Advantage : This disc dashboard pad can attach onto your car and your devices firmly, let your devices don't fly off as you go round corners,easy to use and remove without leaving trace. Application : 3M round flat adhesive stickers fit for dashboard suction cup mount cradle,make your sucker stronger. It also can be compatible with dash cam , GPS , car phone mount,suction adhesive base. 3M Heat Resistant Sticky Adhesive Disc : The high temperature resistance performance of these suction cup adhesive back for dash cam mount reaches 120°C+,you can also use it safely,no more worries.