Dual lenses:With EZVIZ’s unique dual-lens technology, the H9c provides unparalleled protection that’s beyond professional. It uses a wide-angle lens on top of a telephoto pan-and-tilt lens – the duo works independently or together in a way that is much smarter than your ordinary camera. Face two directions: Even if the two lenses are set on opposite viewing angles to secure two different areas, they can complete a single smart tracking task through teamwork. When a human is detected by the upper lens, the PT lens will automatically rotate to such angle to lock on the person and record the whole activity.