https://www.youtube.com/watch?v=6mmKXybp154&feature=youtu.be Instructions: 1) Clean the dirt and fine dust on the back of the phone or on the back of the case 2) The strap can be attached to the back of the phone or the back of the case (silicone and glass are not recommended) 3) The mobile phone is placed horizontally, and the strap is pulled out to open on the stage. 4) The strap can be replaced use: - Reduce the chance of your phone accidentally falling - When controlling the phone, the fingers on the back of the machine can slide freely, and the fingers can easily control every space on the screen. - When you need to vacate your hands, wear them on your forearm - Stand the phone on the stage for easy viewing (not with shell) 1) Is the back of the machine stuck tightly? The back of the machine is basically the same as the back of the machine. In general, the market will try to pull down the strap on the phone than the customer. The customers who have tried are very satisfied with their adhesion. Glass, milled shell and soft shell Ok! For the time being, only the official Apple silicone material is not recommended. 2) How does the strap of the straps come from? Yes, because the connection position is particularly thick to support the weight of the fuselage. Tips: The offer is limited to local (or overseas areas included), and is not responsible for any loss. If you need SF Express, you can add the shipping cost to the station to make up the difference (recommended), or choose SF to pay.