ML300 is a new entry-level fingerprint keypad smart lock with Bluetooth communication. With the compact design and smart core, it amazingly brings a better user experience in all aspects. 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 Amazon Echo or Google Nest device. ML300 will be a wise choice for private houses, junior apartments, and short-term rental; it creates a more straightforward, smarter, and more convenient lives.

Product Image
Product image
Product image
Product image
Product image
Product image
Product image
Product image

Product Features

No Drilling Required

Directly replace the existing lever or knob of a single-hole door

Remote Control

Unlock and manage the lock from anywhere with the optional gateway

Capacitive Fingerprint Sensor

Fast verification for dry and rough fingers

Random Passcode

Secure your passcode from prying eyes

Temporary Access

Share digital keys valid for specific time to friends or guests

Voice Control

Work with Amazon Alexa and Google Assistant

Smart Alerts

Receive real-time notifications of low battery, illegal attempts and hijack

Reversible Design

Fit for all door opening directions

Technical Specifications

Case Material

Zinc Alloy (Level & Front Panel) + ABS (Back Shell)


American Standard Single Latch German Standard Mortise (optional)

Identification Mode

Smart Phone, Fingerprint and Passcode

User Capacity


Fingerprint Capacity


Passcode Capacity


Fingerprint Sensor

Capacitive (silicon)


Bluetooth 5.0

Remote Access

Bluetooth Gateway Required

Voice Control

Amazon Alexa, Google Assistant

Power Supply

4×AA Alkaline Battery (not included)

Backup Power Interface

Micro-USB Port Supported

Battery Life

Up to 1.5 years (about 10,000 access)

Door Thickness

30-60mm (standard)


Adjustable 60 or 70 mm (only for single latch)

Dimensions (W*L*D)

Front – 75*138*23 (mm)

Back – 75*150*27 (mm)

Color Options

Silver / Gray

Operating Temperature

-20°C to 55°C

Operating Humidity

10%~90% RH (non-condensing)