Amazon on Monday announced a new $79 Echo Spot alarm clock with a revamped design and improved audio quality.The company added a display where users can check the time, weather or see what song is playing. Amazon also put a better speaker in the front of the device. It said it delivers clearer vocals and deeper bass.It marks the first upgrade to the device since Amazon introduced the Echo Spot in 2017. The previous version, which Amazon priced at $129, also featured a semicircle design, but it h...