Chen Mang glanced at the iron ore units on the train panel; there were still 61,000 units of iron ore left.
These 110,000 units of iron ore were quite durable.
Without much hesitation, he consumed 4,400 units of iron ore to upgrade the "Car Sound System" accessory to level 10, and obtained two corresponding supermodel effects.
This is a white-grade accessory, so upgrading it consumes relatively fewer resources.
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"Car Sound System Level 5 Supermodel Effect": If the train is equipped with 'headlights' and 'train assistance AI' accessories, when playing music, the headlights will automatically change light and color, creating a stage light show that matches the song rhythm through visual effects.
"Car Sound System Level 10 Supermodel Effect": Can emit ultrasonic noise above 20,000 Hertz. If the grade of consumed energy stone is high enough, it can produce even higher Hertz ultrasonic noise.
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The first supermodel effect goes without saying.
