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A key can be copied and a password can always be cracked given enough time. Moreover, a frequent problem is that you may lose your key or forget your password. But your fingertip is always with you!
Firefly is really made to make your world look brighter. Take the Firefly with you wherever you go: Outdoor parties, camping trips, bike rides, or as an emergency in darkest hours. The Firefly weighs only six ounces (28 grams) and it is unbreakable. The outer bulb is made from flexible silicone so damage option can be excluded here.
When you are home alone and the doorbell rings it can be distressing and kind of annoying. With Skybell you can detect who is on the other side before you even answer the door. Furthermore, don't you need to be able to see who is knocking at your door when you aren't there, but your kids are?