It’s super easy to install on the existing lever or knob of a single-hole door directly and finish the lock’s setup with just a few processes in minutes. The additional Bluetooth Gateway allows you to unlock the door lock remotely, check the log history, and share the temporary or dynamic passcode via Zsmart App. More importantly, you can unlock the lock with voice commands when paired with a compatible.ML300 will be a wise choice for private houses, junior apartments, and short-term rentals; it creates a more straightforward, smarter, and more convenient life.