The mobile phone holder attaches to the mirror. It is metallic and seems durable. It is a complete set, with a connection cable to the battery for charging via USB, and with a rubber band for holding and securing the phone.
Large phones with a 6.7-inch screen struggle to be held by the arm alone; the rubber band is also needed. Once, when I didn't use it, the phone fell off while driving.
The rubber band deteriorated and broke after about 6 months of exposure to weather conditions (sun - rain). I ordered another rubber band (I only found a branded one) because I don't want to risk the phone falling again. Now, with the new rubber band, it is very stable in the holder. This one lasted 8 months. After a year and a half, the other little rubber pieces that hold the phone on the arms also deteriorated and broke. So, in the end, it was thrown in the trash.
The worst part is that it doesn't hold the phone well and it can fall off while driving