Features: Dynamic Volume Control Dynamic Sound Effects Directional Sound Control Dual Exhaust & Full-Fidelity Sounds Multi-stage Jake or Interbrake system Description: Full engine sound set professionally recorded from the engine, intakes and exhausts. Complete engine RPM spectrum recorded, producing a very detailed sound. Authentic jake brake sound includes 3 stages. 460, 500, 525 and 800HP engines. Will work with all default trucks and popular modded trucks such as the Rollin 389, Jon-Ruda W900 etc (see full list). Open Definition files for modders. Full support for Convoy mode. -Includes Zeemod’s “In Sound We Trust” digital air fresheners for you to install in your truck! Support for 1.46 Credits Zeemods