M4 Smart Fingerprint Lock with Zinc Alloy Body and 30-Fingerprint Capacity

This smart fingerprint lock model M4 offers a practical solution for home security, combining fast biometric access with a traditional key backup. Designed for everyday convenience, it eliminates the need to carry keys while providing reliable entry for up to 30 registered users. The lock's compact 145 by 65 mm dimensions fit standard door cutouts, and its zinc alloy construction ensures a solid feel. With a 0.5-second recognition speed, it is suitable for family homes or small offices seeking key-free entry without complex wiring or smart home integration.

Features and Construction

The lock is built around a semiconductor fingerprint module and a zinc alloy housing. Its design focuses on straightforward operation and physical durability.

Material and Build

The lock body is made from zinc alloy, giving it a robust, matte black finish. The semiconductor acquisition module is used for fingerprint capture, offering consistent reading across the 30 stored fingerprint templates.

Size and Practical Fit

Measuring 145 mm in height and 65 mm in width, the lock is designed to replace or retrofit onto standard doors without major modification. The compact form is suited for both interior and exterior doors in residential settings.

Uses and Placement

This lock is intended for residential or small office doors where quick, key-less access is beneficial. It operates within an ambient temperature range of -20° to 55° Celsius.

Event or Professional Use

While primarily a home device, it can be used in small office or rental property settings where controlling access via fingerprint is practical. The 30-group capacity suits teams or family groups.

Everyday Home Use

For daily home use, the lock eliminates the need for physical keys, allowing family members to enter using fingerprints. The key backup ensures access if batteries run flat.

Benefits and Buying Value

The lock offers straightforward operation with a 0.5-second recognition speed, reducing wait times at the door. It runs on standard AAA batteries, making power replacement easy.

Reuse and Low Maintenance

The lock requires minimal maintenance beyond periodic battery changes. The zinc alloy body resists wear in normal indoor or covered outdoor use, and the semiconductor module has no moving parts to adjust.

Why Choose This Product

This lock provides a balance of speed, capacity, and physical build quality. It is a reliable choice for users who need fingerprint entry with a simple key backup, without requiring network connectivity or app control.