1. Car holder material: PC + aluminum alloy + silicone, therefore holder is durable and safe. 2. Press the button to adjust the width of the clamp, so it is compatible for different devices. 3. Sliding silicone roller not hurt the phone, hence you no need to worry of your device safety. 4. One-handed operation, so you can use it without distraction from driving. 5. Net weight: 98g.