Password Design: When unlocking with a password, you can add multiple false passwords before/after the entering correct password. Press # to confirm the lock. (The anti-peep garble can be entered up to 30 digits.) Low energy consumption: 4pcs 1.5V dry batteries are powered. They can work continuously for one year. It also has low power and warning functions (about 200 times for unlocking after prompting, please change the batteries urgently). Breathing Light Mode: Automatically identify user actions. Blue: Wake Up, Red: Error, Green: Correct. Alarm lock: enter the wrong password 5 times in a row, the system will alarm and be locked for 3 minutes. Backup external power supply: for Android mobile phone USB standard interface, emergency power supply unlock when the batteries exhaustion and power failure. One Card Solution: Support a variety of non‑contact smart cards (e.g. using second‑generation ID cards can be used to unlock after adding). Easy installation: no need to punch holes, external wiring and network equipment required. Wide applicability: frameless/frame glass doors, single / double doors, left / right doors can be installed. Real person voice alarm: voice navigation throughout the process, easy to operate. Various unlocking options: fingerprint, password, credit card and remote control.