A smart video door bell is in-expensive, easy to install and simple to use. If your not the handy type or uncertain which video door bell is right for you, we can help! There are very little differences among these video door butlers, besides their aesthetics. If you have an existing door bell wire this will save you a lot of hassle from replacing or charging batteries. The battery life varies upon the amount of visitors you get and how often you view the bell ringers.