Apple Watch Series 2 watch face (left) and Fitbit Surge smartwatch (right) source Medical Info Today title Fitbit Smart Surge review article Apple TV Series 3 smart TV with 4K resolution (left), Amazon Fire TV Stick and Google Chromecast adapter (right).
Apple TV TV Series 4 smart TV (left).
Apple TV Series 5 smart TV, Amazon Fire HD Stick and Chromecast with HDMI output (right), Google Chromecast adapter (left and right).
Apple HomePod, Amazon Echo Dot and Google Home Mini with HDMI outputs.
Apple TV, Fire TV, Google Chromebox and Chromecasts (left, right)Amazon Echo Dot, Google Home, Fire HD and Google Cast (left with speaker).