Which of the following adds a basic security measure to a wireless device?

A hands-free headset is an accessory for audio convenience and does not provide security for the device itself.

A screen lock feature, such as a PIN, pattern, password, or biometric authentication, is a fundamental security measure for any wireless device. It prevents unauthorized individuals from accessing the device's data and functionality if the device is lost, stolen, or left unattended.

Airplane mode disables wireless communication (cellular, Wi-Fi, Bluetooth) but does not secure the device against unauthorized physical access to its content.

A clip-on case provides physical protection against damage, not digital security against unauthorized access.