Smart glass door fingerprint lock with four unlocking methods and voice guidance Key benefits Multiple convenient unlocking options: fingerprint unlocking, password unlocking, card unlocking, and remote unlocking for flexible access control. Enhanced security: virtual password allows adding extra incorrect digits before or after the correct code to prevent observation attacks. Press # to confirm the password. Clear voice support: real voice alarm and doorbell functions plus full voice navigation simplify setup and daily operation. Reliable power and emergency support: powered by four 1.5V dry batteries for over six months of typical use. Low power guard and warning function provide a prompt when battery replacement is needed (after prompting to unlock about 200 times, please the battery urgently). Type C interface emergency charging allows temporary power to unlock when batteries are exhausted. Strong locking mechanism: internal double hook design provides a firm hold suitable for frequent use. Easy installation and wide compatibility: designed for frameless or framed glass doors, single or double doors, left or right opening doors, sliding doors, and automatic doors. Installation uses plug in auxiliary tools with no need for external wiring or network equipment. Important features and performance Unlock methods: fingerprint, password, card, remote. Security features: virtual password entry, real voice alarm. Power: 4 x 1.5V dry batteries, low power warning, Type C emergency charging. Mechanical design: double hook internal structure for secure locking. Installation: plug in auxiliary tools; compatible with a wide range of glass door types. Practical use scenarios Office entrance or meeting room: grant employees quick access with fingerprint recognition, allow managers to unlock remotely for guests, and use the doorbell and voice prompts for visitor communication. Retail or showroom glass doors: secure off hours with card or password access for staff, while keeping a simple remote option for authorized personnel. Apartment or residential glass doors: maintain secure, easy access for household members with fingerprint unlocking and receive clear low battery alerts before power runs out. Why choose this lock Offers multiple, redundant unlocking methods so access is always available. Built in voice guidance and alarm reduce installation and operation complexity. Designed specifically for glass door applications with a firm double hook mechanism and straightforward, wiring installation. Specifications summary Unlocking: fingerprint, password, card, remote. Voice: doorbell, voice navigation, real voice alarm. Power: 4 x 1.5V dry batteries; Type C emergency charging. Lock structure: double hook internal design. Door compatibility: frameless or framed glass doors, single or double doors, left or right doors, sliding doors, automatic doors. Note: Follow the included voice guidance during installation and battery replacement to ensure correct setup and reliable performance.