Smart speakers like Amazon Echo and Google Home are mostly verbal affairs. You talk to them and they respond by voice. Visual feedback is mostly an afterthought, an add-on, or a different device altogether. That makes it sometimes difficult to check the type of notifications you get without having these assistants blurt out potentially incriminating information. Fortunately, at least one of them does have an alternative means of calling your attention. Amazon has just given the Echo a few more light signals, distinguishing between an incoming call and an incoming message.