Wearables fall into several categories, each serving unique purposes. These include:

• Smart Glasses & Headgear (e.g., Google Glass, Samsung Gear VR) for augmented reality and hands-free computing.
• Fitness Trackers (e.g., Fitbit, Nike FuelBand, Microsoft Band) for monitoring physical activity.
• Smartwatches (e.g., Apple Watch, Android-based watches) that combine timekeeping with smartphone functionality.
• Wearable Medical Devices (e.g., Medtronic’s glucose monitors, ZIO Patch) for continuous health monitoring.
• Smart Clothing & Accessories (e.g., Levi’s Smart Jacket, Visijax wearables) that incorporate tech into everyday attire.

These devices leverage three core technologies: sensors to sense and translate data, processors to prepare it for transmission, and communication modules to send it to cloud storage or paired devices.