Sound Quality – Look for balanced bass, mids, and treble.

Comfort & Fit – Try different ear tip sizes or ergonomic designs.

Battery Life – Especially important for wireless/TWS models.

Microphone Quality – For clear calls and voice commands.

Water/Sweat Resistance – Useful for workouts or outdoor use (IPX ratings).

Controls – Touch or button controls for volume, calls, and playback.

Bluetooth Version – Newer versions (e.g. 5.2, 5.3) offer better range and stability.

Latency – Important for gaming or watching videos; look for low-latency modes.