There are many doorbell cameras available, from basic doorbells that record video to high-resolution doorbells equipped with sirens and motion sensors. Smart speakers and smart devices can also be used to connect more sophisticated cameras. For example, you could ask Alexa for your front door through an Amazon Echo Show or receive live alerts from your smart TV.These various doorbell camera types fall into two power categories--battery-powered or hardwired--and offer local storage via microSD card or cloud storage. To work, all doorbell cameras must have an active Wi Fi network.