Amazon on Wednesday began shipping its latest smart home product, a security camera that works with its Alexa personal assistant and Echo speakers. The Amazon Cloud Cam allows customers to live-stream activity inside their home 24/7. It features 1080p full HD resolution, two-way audio for communicating with family members or pets, night vision technology, and sophisticated algorithms that use machine learning to figure out if the stranger entering your house is the building super or a possible burglar.