What are the building blocks of a great smartwatch? Startup Blocks Wearables thinks it knows. Its module device, Blocks, starts with one of three displays, but you can snap in modules to add more power and capabilities.
Caption:Jessica DolcourtPhoto:Blocks Wearables, modified by Jessica Dolcourt/CNET
Diving in, this circular option has a processor, Bluetooth and battery, in addition to a touchscreen panel and other sensors.