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The Logitech Harmony 600 keeps things fairly simple with a backlit monochrome display, while the Harmony 650 packs a color screen and icons for both your favorite channels and for common commands. Both models support more than 250,000 home entertainment devices from over 5,000 brands. Compared to the Harmony 700 they mainly drop two features: they can control five devices instead of six and are not rechargeable.
Like all Harmony remotes, though, these models are programmable via a Mac or Windows PC and use activity-based commands to control your home audio and video systems.