Does it have manual override option meaning it can’t be open from outside?

It has a manual key, so if all else fails you can still open it

Can it be left unlocked for a period of time or is it always locked?

Hello, There is a feature within the app called passage mode. This feature will disable the auto-lock during a schedule and allow the lock to stay unlocked. Thank you for your question.

Can the key lock be rekeyed to match existing house key?

Hello, This lock cannot be rekeyed. Thank you for your question.

Is it compatible with Yale

Hello, This lock is not compatible with Yale. Thank you for your question. Best, Sifely Team cs@sifely.com

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Keyless Entry Fingerprint Digital Smart Lock with Handle & Keypad: Electronic/Electric Lock with Code, App Control Biometric Deadbolt Door Knob for Front, Interior, Exterior & Bedroom Door (Black)

Keyless Entry Fingerprint Digital Smart Lock with Handle & Keypad: Electronic/Electric Lock with Code, App Control Biometric Deadbolt Door Knob for Front, Interior, Exterior & Bedroom Door (Black)

Product ID: 406510204

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Details

Brand
Dermum
Special Feature
Auto-Lock Lock
Lock Type
Biometric Lock
Item dimensions L x W x H
7 x 3 x 1.2
Material
Stainless

📱Real-time app control & notifications

🔒5-in-1 keyless entry

🛡️Auto-lock & anti-theft alarms

Description

🔐 Elevate your door game—secure, smart, and effortlessly stylish.

SEAMLESS VOICE INTEGRATION - Hands-free control with Alexa & Google Assistant—lock or unlock with a simple command.
BUILT TO BRAVE THE ELEMENTS - Weather-resistant stainless steel design ensures durability for front, garage, or interior doors.
ULTIMATE KEYLESS CONVENIENCE - Unlock with fingerprint, code, fob, app, or traditional key—never fumble for keys again.
EFFORTLESS SHARING MANAGEMENT - Generate and revoke access codes remotely—perfect for homeowners, hosts, and property managers.
SMART SECURITY AT YOUR FINGERTIPS - Receive instant alerts and access logs via app for total peace of mind, anytime, anywhere.

The Dermum S2 Model is a sleek, black biometric smart lock featuring 5-in-1 keyless entry options including fingerprint, keypad, fob, app, and traditional keys. It offers real-time app notifications, access logs, and integrates with Alexa and Google Assistant for voice control. Built with weather-resistant stainless steel, it includes advanced security features like auto-lock, anti-theft alarms, and privacy mode, making it ideal for front, interior, and garage doors.

Specifications

Brand	Dermum
Special Feature	Auto-Lock, One-Touch Lock, Anti-Peeping Password, Back-Lit Keypad, Fingerprint, Fob Unlock, Passcode Unlock, Touchscreen, Weather Resistant
Lock Type	Biometric, Combination Lock, Deadbolt, Keypad
Item dimensions L x W x H	7 x 3 x 1.2 inches
Material	Stainless Steel
Recommended Uses For Product	Door
Style	Bluetooth Version
Color	Black
Number of Pieces	16
Controller Type	Amazon Alexa, Android, iOS, Google Assistant, Hand Control, iPadOS
Shape	Oval
Item Weight	3.6 Pounds
Control Method	App, Remote, Touch, Voice
Connectivity Protocol	Wi-Fi
UPC	745808812522
Model Name	Dermum S2 Model
Manufacturer	Dermum
Part Number	Dermum S2 Model
Item Weight	3.63 pounds
Product Dimensions	7 x 3 x 1.2 inches
Item model number	Dermum S2 Model
Batteries	4 AA batteries required.
Size	Smart Lock
Special Features	Auto-Lock, One-Touch Lock, Anti-Peeping Password, Back-Lit Keypad, Fingerprint, Fob Unlock, Passcode Unlock, Touchscreen, Weather Resistant
Batteries Included?	No
Batteries Required?	Yes