Patent filing reveals Smart Modular Bands for the Apple Watch21
By offering this accessory, Apple won't have to introduce new hardware every time it wants to add certain features to the Apple Watch. Some of the potential features listed on the patent application include additional battery power, a blood pressure monitor and thermometer, GPS module, speakers, a camera, and a module that measures the amount of sweat generated by an Apple Watch wearer.
The patent application doesn't reveal when we might see these bands offered to the public. Last month, Apple introduced some new bands for the Apple Watch while lowering the starting price by $50 to $299.
source: FCC via AppleInsider