This Eufy Security Smart Lock D20 with WiFi Bridge drops from $159.99 to $119.99 with free shipping from EufyHome via Amazon after you click the $40 off coupon box below the price and proceed to checkout. Home Depot appears to match this price but does not include the WiFi bridge, making this deal the best price by $45. This deadbolt lock can open automatically when a designated Bluetooth device is near or with a programmable code. It also can be locked or unlocked over WiFi. Sales tax is charged in most states.