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The ZKTeco AL20B Smart Door Lock is a Bluetooth lever smart lock with touch screen control, designed for homes, apartments, offices and warehouses. It offers fingerprint, PIN, mobile app and mechanical key access, making it a flexible option for secure everyday entry. The AL20B includes voice guide programming, low battery warning, illegal operation warning and random password protection to help improve code security. It also features lock-out mode, a reversible handle and remote visitor password support. With adjustable voice volume settings, zinc alloy construction and emergency 9V backup battery support, this smart lock provides practical access control for a wide range of spaces. (Model LK175-6)
| App Control | Yes |
| App Name | ZKBioBL |
| Cellular Connectivity | Bluetooth |
| Door Thickness | 30-54 mm (standard) |
| Model Number | LK175-6 |
| Power Supply | 9 V |
| User, Password and Fingerprint Capacity | 100 |
| Wi-Fi Connectivity | Yes |
| Wireless System | Yes |
| MPN | LK175-6 |