This is an optional Team Associated ESS-One Engine Sound System. The ESS-One is a high performance vehicle engine sound simulator system with a strong sound-mixing unit, efficient high power amplifier and a loudspeaker of optimized acoustic design, producing a perfect and realistic simulation effect.

Features:

• Plug and Play Audio device
• Universal fit
• USB updatability
• 25 different engine sounds to choose from
• 20+ auxiliary sounds to choose from, such as horns, sirens, and turbo
• Speaker unit size: 3.9"L x 1.88"W x 1.35"H
• Speaker unit weight: 90.2g (3.18oz.)