🔊 Why Does the Sound Change When My ETENWOLF Inflator Nears the Preset Pressure?

Applies to Models:
✅ Zephyr S3
✅ Zephyr S5
✅ Vortex S6
✅ Vortex S6E
✅ Vortex S7

🎧 What You’re Hearing Is Normal

When using your ETENWOLF inflator, you may notice a change in tone or sound as it nears the preset pressure value.
This is completely normal and part of the device's smart inflation process.

🔄 Why the Tone Changes

These inflators are designed with intelligent pressure control. As the tire pressure approaches the preset target, the inflator automatically reduces airflow speed to deliver more precise inflation.

Here's what happens:

• The device slows down as it nears the target PSI.

• This reduces motor load and prevents overshooting the pressure.

• The change in motor tone is a direct result of this transition.

This adjustment is intentional and ensures both accuracy and safety during inflation.

📊 Noise Levels by Model

For your reference, approximate operating noise levels are:

These values may vary slightly depending on usage environment and pressure level.

✅ No Action Needed

This tone change is:

• Expected

• Safe

• A feature, not a flaw

It's part of the system’s built-in design to ensure accurate results and prevent over-inflation.