The Luxury Aluminum Part Tray 3 has smart phone compartment (height: 10mm, width: 10m) that you can put your iphone or other similarly sized electronic device in for easy storage and viewing. The total size is about 130mm x 170mm with three separate parts organizers within. There is a small magnetic area to prevent small items, like body clips and set screws, from rolling away, offers a gauge to check screw length and a bullet plug soldering section.