This smart door lock works multiple waysThe Aqara U50 smart lock retails for $150, and is sold by Amazon. It comes in a matte black finish only and weighs 3.42 pounds. It's 5.31" x 2.91" x 3.46 ...

Smart lock lets you open the front door with your mobile - and you don't even need to take it out of your pocket $249 lock can be set to allow workmen and dog walkers to open the door ...