ST-668D Electronic Touchscreen Keypad Deadbolt Lock for Front Door Locksets with High Security

50 In stock
$98.47 $64.99
Free shipping in the US and Canada.
Fast delivery. Orders shipped in 24 hours and delivered within 3 days.
Shipping policy.
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Features for ST-668D Electronic Keypad Front Door Deadbolt Lock

Signtek digital touchscreen keypad deadbolt lock with digital smart lock features touchscreen keypad, emergency mechanical key, anti-peep password, mute function, stay unlocked function and waterproof function.

Strong material

Signstek's digital smart door locks with electronic keypad deadbolt lock are made of commercial grade zinc alloy to greatly enhance your home security for your front door lock.

It not only has a good appearance, but also has a strong anti-corrosion ability, and can withstand all kinds of bad weather.

Keyless entry

Free your hands, you no longer need to use the key to open the door.

You can design 10 different codes (1 administrator and 9 users) and use one of them to unlock the door.

Simplest installation

Even if you are not a professional, you can complete the installation quickly and smoothly as long as you follow the steps according to the instructions.


ST-668D touchscreen keypad deadbolt lock

IP44 waterproof protection

Its shell is waterproof and dustproof, and it can be used normally even on rainy days. Therefore, it is also suitable for use as front door locksets.

Touch-sensitive screen

The smart touch screen with digital lock has a sensing ability that is accurate and fast.

The digital screen is also equipped with a blue backlight to help you accurately enter the correct code in the keypad deadbolt lock in dark conditions.

Mute function

You can set your code to mute input, so strangers won't steal your code by hearing the length of the digits on the keyboard as you enter it.

Forgot your code? There is also a keyhole

If you forget your code, you can use the emergency key to open the front door deadbolt. The low power indicator will notify you when the battery is low, and if the replacement fails, you can still open the door with the emergency key.








Package Dimensions

9.88 x 5.51 x 4.02 inches


3.15 Pounds

Batteries Included?


Click here to view the user manual: ST-668D Electronic Touchscreen Keypad Deadbolt Lock User Manual

Customer Reviews

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Free Shipping

SIGNSTEK™ offers free shipping for the contiguous 48 U.S. states. Transit time is 5-7 business days. 

All SIGNSTEK™ products are stored in warehouses in Amazon warehouse or UPS warehouse in United States/Canada, and all our products use FBA or UPS shipping.

United States/Canada  Out of US.

Guaranteed Arrival

3-5 bussiness days or less 


In orders with more than one item, the processing time will be based on the item with the longest processing time. All orders can be shipped out within 24 hours on weekdays. Please note that the processing time is not included in the shipping time.

During public holidays, transportation time or processing time may be affected (up to 72 hours delay) because manufacturers and couriers will restrict their operations during this period. Although this is unfortunately out of our control, we will try our best to improve on this issue.

Order Successful
After you have successfully placed your order you will receive email confirmation from us. If you have any requests for your order, kindly let us know as soon as possible before your item enters the processing stage.

Contact us
If you have any urgent questions about the shipping, just feel free to contact us on our Facebook home page or send an email to us.

Return & Refund


SIGNSTEK provides a 30 days return or refund guarantee. If you’re not satisfied with your purchase and want to request a return or refund, please contact our customer service for the return or refund process. 
To be eligible for a return, your item must be unused and in the same condition as you receive. It must also be in the original packaging.


a. Customers will only be charged once for shipping costs (this includes returns); No-restocking to be charged to the consumers for the return of the product.
b. In the event ships for free, the customer will be informed of the return shipment cost (estimates may be given based on our own costs in shipping to customers)

Refunds (if applicable)

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

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ST-668D Electronic Touchscreen Keypad Deadbolt Lock for Front Door Locksets with High Security
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