Its prefix means "one," but Monocle is not just one thing. In fact, it has three functions (we suppose calling it a Trionocle would be cumbersome). This retro-styled smartphone companion plugs in to serve as a speakerphone, handset, or speaker. The full duplex enabled microphone ensure vocal clarity, so that Grandma will never ask you to repeat yourself. When it’s time to party, you can even link multiple Monocles to pump up the jams.