LOUD AND CLEAR WARNINGS: An 80dB siren ensures you will not miss an alert. STAY ALERT AND STAY SAFE: Receive instant app notifications for smoke detection. ALERT: An 80dB alarm provides a loud warning in case of fire, ensuring you are alerted to potential dangers even while sleeping or in another part of your home. COMPACT DESIGN: The smart smoke detector is not a bulky ceiling or wall disc. It has a compact and appearance, allowing for discreet placement. EASY TO INSTALL: The smoke detector and fire alarm come with mounting screws and stickers for convenient installation in your home or bedroom. NOTE: Actual color may vary slightly from the image due to lighting differences. Allow 1-3cm variation due to manual measurement. POWER SOURCE: Uses a DC9V alkaline battery (6LR61/9V), battery not included. QUIESCENT CURRENT: Alarm current: Operating temperature: 0°C to +50°C. Relative humidity: ≤80% RH. LOW BATTERY WARNING: Built-in low battery alert.