This door lock features advanced security with fingerprint recognition, a rechargeable battery, and a touchscreen keypad. It is compatible with smartphones and can be controlled remotely. It also has a passage mode for convenient access and an anti-peeping function for added privacy. The price drops from $47.49 to $39.99 to just $29.99 when you clip the $10 off coupon on the product page. Shipping is free for prime members or on orders over $35.

Clip the  $10 off coupon.