XB5S Biometric Pushbutton Switches Schneider Electric XB5S Harmony Biometric Pushbutton Switches offer advanced fingerprint recognition technology, providing increased security. The XB5S switches are an innovative, stand-alone solution that protects operators and equipment from unauthorized access and usage. Simple, reliable, and efficient, the Harmony biometric switches use trustworthy technology, offer excellent resistance to mechanical shock and vibration, and have a memory capacity of 200 recorded fingerprints. The XB5S switches offer protection in the areas of theft, copying, lending, forgetfulness, and loss.