SONY WF-C710N Wireless Bluetooth Noise-Cancelling Earbuds - Black

Speaker drivers are tested for balanced output, distortion, and channel balance across the frequency range.

Active noise cancellation and transparency modes are verified where the product includes them.

Wireless pairing, range, and reconnection are tested on supported Bluetooth versions.

3.5 mm, USB-C, and other wired inputs are checked for a stable audio signal.

Built-in microphones are tested for clear voice pickup on calls and recordings.

Wireless battery life and charging behaviour are tested for reliable everyday use.

Charging cases and docks are inspected for contact points, lid mechanism, and power delivery.

Cushions, ear tips, and headbands are checked for comfort, fit, and wear.

Physical buttons, dials, and touch controls are tested for consistent response.

Charging and audio ports are inspected for damage and reliable connection.

Ear pads, grilles, and housings are cleaned so the product arrives presentation-ready.

Serial details are recorded and matched to the product identity.

Where repairs are needed, only approved components are fitted during refurbishment.

Included cables, cases, and tips are checked for completeness and working condition.

Additional checks for product-specific features such as multipoint pairing, EQ presets, or spatial audio.