The Microsoft HoloLens v1 is an augmented reality headset developed by Microsoft, designed to overlay digital content onto the real world. It features see-through holographic lenses with a resolution of 1268 x 720 pixels per eye, providing a clear and immersive mixed reality experience. The device is powered by an Intel 32-bit architecture CPU and a custom-built Microsoft Holographic Processing Unit (HPU), ensuring efficient processing of both the physical and digital environments. It includes 2GB of RAM and 64GB of flash storage. The HoloLens v1 has built-in spatial sound speakers, allowing users to hear holograms from various directions. It uses multiple sensors, including an inertial measurement unit (IMU), ambient light sensor, and four environment understanding cameras, for precise spatial mapping and tracking. The headset supports hand gestures, voice commands, and gaze tracking for intuitive interaction. Designed for comfort, it features an adjustable headband and a balanced weight distribution. The HoloLens v1 is powered by a battery that offers approximately 2-3 hours of active use.