Requiures Eufy HomeBase to Operate: Compatible with HomeBase Mini (v4.0.5.2 or above), HomeBase 2 (v3.4.1.2 or above, released after 2021), HomeBase 3 (v3.7.2.6 or above), and HomeBase Pro (v4.1.4.3 or above). Ensure your HomeBase is updated to the latest version for optimal performance. Accurate Fire Alerts: Complies with UL 217 10th edition standards, ensuring precise detection of various smoke types without triggering false alarms. Ultra-Compact Modern Design: With a diameter of just 70 mm (2.75 in), this smoke detector is one-third the size of traditional models, blending seamlessly into any home environment. Expansive Wireless Range with HomeBase: Provides a stable connection with HomeBase at open-air distances of up to 656 ft (200 m).