About this item 【Three Way to Quick Unlock: Bluetooth APP & Fingerprint & USB Key】 This smart cabinet lock can be unlock by fingerprint or Bluetooth APP, which provides you various ways to access the lock. There is also an additional USB key for the metal one as a backup plan just in case the lock does not function properly. Fingerprint and password setup is easy and instructions are provided on the user guide, phone and APP are not needed. 【Support 20 Fingerprints & One Emergency USB Key...