1Cost-effective, it has most of the functions of a general smart door lock 2No need to change your own door lock, economical and convenient 3Full metal lock body, equivalent to a small safe, and it can store some necessary things 4Forgot to bring the key, take out the trash, getting newspapers, the door was closed ? This is not a problem 5New house renovation, just put a key in it, and you don't have to go back and forthFeature:Made with high quality metal for maximum durability. Cost-effective, it has most of the functions of a general smart door lock. No need to change your own door lock, economical and convenient. Full metal lock body, equivalent to a small safe, and it can store some necessarythings. Forgot to bring the key, take out the trash, getting newspapers, the door was closed ?This is not a problem New house renovation, just put a key in it, and you don't have to go back and forth. Even if you do not put things, it is a nice decoration. Specification:Condition: Brand NewMaterial: MetalSize: Approx 180*66*34mm/7.1*2.6*1.3inColor: As Picture ShowPackage Weight: Approx 577gPackage List:1 * Key Lock Box1 * Screw1 * User ManualNote:1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showingslightly different from the real object. Please take the real one as standard.