Ring, the Amazon-owned video doorbell maker, is expanding its smart home empire with a new device: a smart lock that can be hand-cranked when its battery dies. The idea came from Ring’s founder Jamie Siminoff, who struggled with the prospect of a vacation home being locked out due to a dead battery.

Siminoff’s solution is a lock with a power dial. If the battery runs out, the homeowner can simply turn the dial a few times to power up the lock and gain access. The device’s battery is expected to last about a year, with alerts sent via the Ring app when it needs charging. Once inside, users can charge the battery pack as usual.

Ring’s smart lock offers four different ways to gain entry: a fingerprint reader, a backlit touchscreen keypad, the Ring app, or Alexa. The company’s ultimate goal is to allow third-party app makers to design software for the lock, enabling features such as changing codes for Airbnb guests.

Ring’s new product will be available in the U.S. in the first quarter of 2027, after receiving FCC authorization. It will come in three finishes: black, silver, or brass. Alongside the lock, Ring also introduced four new 4K cameras: the Outdoor Cam 4K Plus, Spotlight Cam 4K Plus, Floodlight Cam 4K Plus, and a pan-tilt Indoor Cam 4K.