BuyDig via Rakuten offers the Yale Locks B1L Push Button Z-Wave Door Security Bolt in Satin Nickel for $104.99. Coupon code "HOME20" cuts that to $83.99. With free shipping, that's the lowest price we could find by $31, although we saw it for $4 less in January. Features include: Z-Wave system compatibility (SmartThings, Wink,, etc.) storage of up to 100 4- to 8-digit PIN codes backlit keypad motorized deadbolt 9V battery terminal for emergency charging