The G99 PRO Smart Door Knob is a compact, all-in-one electronic door knob made of durable aluminum alloy, designed for modern residential use. It supports three convenient unlock methods—fingerprint, physical key, and APP control—for quick and flexible access, and operates reliably across temperatures from -25°C to 70°C. Powered by 4 AAA batteries and equipped with a Type-C emergency power interface to prevent lockouts, it meets FCC/FCCID certification and BHMN Level 3 security standards, making it a weather-resistant, space-saving, and secure upgrade for interior and exterior home doors.