Single cylinder deadbolts require a key to unlock and lock the door from the outside. From the inside the door can be locked or unlocked with a simply turning the thumb turn mechanism. If any doubt take a photo of the lock you wish to replace with Friday Lock and send to firstname.lastname@example.org
The installation takes between 10 and 30 minutes.
The Friday Lock uses a rechargeable lithium battery with an equivalent lifetime of 8xAA high quality batteries, and reduces the size of the product substantially. In normal usage conditions the battery life is about 3 months before needing recharge. When the battery runs low, you will see an indication in the app. A USB charger is included in the package.
As the Friday Lock leaves your existing lock intact, you can always lock/unlock your door in the traditional way with a key (or from inside by just turning the shell).
Yes, Wi-Fi is intermittently used for auxiliary functions. The lock will continue to function using Bluetooth.