Pro-Ject Primary USB Turntable (RED)Like the Elemental Phono USB, the Primary Phono USB uses an 8. 6 aluminium tonearm with sapphire bearings for optimal tracking. The tonearm is pre configured for the supplied Ortofon OM 5E pick up cartridge, so theres no need to set up the tracking force or anti skate during installation. The motor is also the same perimeter belt drive type, with a low vibration synchronous motor thats controlled by a built in regulator for improved speed stability.