Installation is very simple:Wiring-free structure, you need is a screwdriver,you can install it yourself. Handle no need to choose a direction,can be interchanged left and right, don't worry about choosing the wrong direction. Easy Operation:You can not only unlock the door with your fingerprint,You can also use the original key to unlock in an emergency. Indubitable Safety:Your fingerprint is unique in the world, which guarantee the safety without doubt. Taking advantage of technology of semiconductor and biological characteristics is adopted, which avoids the same fingerprint. 1-step Accessing:Ergonomic design, easy for you to unlock the door within 1 second by putting your fingerprint on it.