ADEL LA9-388 SC RH Fingerprint Keypad Lockset, Satin Chrome, Left Hand 99 fingerprints; each fingerprint has its own number from 00 to 99 Master fingerprint is authorized to add or erase single fingerprint Infrared detetector sense finger and auto activates Lock features three independent locking features, pin code, key, and fingerprint Easy Installation; only one wire to connect