The Roku is a streaming media player, which means it takes content from the Internet and displays it on your TV. The Roku comes in six models, differentiated by performance and features. However, all models can access all 3500+ Roku channels. Here are some other features that are common to all the models:
The average adult human weighs 62kg, so that would make the average ant about 60mg. There are ants that weigh 60mg, but they're really the big ants, says Francis Ratnieks, Professor of Apiculture at the University of Sussex. The common ants which live in British gardens weigh about 1mg or 2mg..
As for brain-to-body mass ratio, some small insects seem to win out. This is because of an allometric principle called Haller's Rule, in which smaller animals tend to have proportionally larger brains. Some small ants have brains about 15% of their total body weight. (See The Allometry of Brain Miniaturization in Ants by Marc A. Seid et al., Brain, Behavior, and Evolution, 2010.) In general, younger animals tend to have the largest head-to-body ratios.