Crystal display: The Sony 2K sensor integrated in the doorbell has a camera function, combined with advanced distortion correction, to ensure that the visitor's recording is clearer.No charge: Security products protect your home and wallet-no hidden costs and fees. Your data is stored on the local device and processed only by you.Dual energy: 6 months of battery power and charging options with charging cable can be used on a single charge, making your home completely safe.Advanced view: The advanced 4:3 aspect ratio allows you to get a clear picture of all visitors from head to toe. Whether it's mailing a bouquet or your parents-you feel completely safe at all times.Making EUFY SECURITY HOMEBASE 2: The wireless video doorbell is used to expand the existing surveillance network and requires HomeBase 2 to run. Unfortunately, there is no HomeBase 2, only the doorbell has no function.