Dr. Bai graduated from the The Fourth Military Med Univ, Xian City, Shaanxi, China in 1984. He works in Tracy, CA and 1 other location and specializes in Pain Management. Dr. Bai is affiliated with Doctors Hospital Of Manteca and Sutter Tracy Community Hospital.
Answer Wiki. The Amazon Echo and Amazon Echo Dot are stationary devices (they need to be plugged in). The difference between them is that the Amazon Echo has a much better speaker built in, while the Dot is intended for use with an external speaker via line out/Bluetooth. The Dot is much smaller and cheaper so if you want Alexa in multiple locations, it's the best option.
In March 2016, Amazon unveiled the original Amazon Echo Dot, which is a hockey puck-sized version of the Echo designed to be connected to external speakers due to size of the onboard speakers, or to be used in rooms such as the bedroom as an alternative to the full-sized Echo.