Features 1、【Wireless Fire Detection】: Smoke detector instantly detects fires and sends alarm signals to the fire control panel wirelessly within a range of 200m/656ft. Widely used in homes, factories, schools, shops, offices, villas, and other places that require fire protection. 2、【360° Smoke Detection】: Fire alarms smoke detectors provides full coverage smoke detection with no blind spots, ensuring reliable and accurate fire alarm notifications. 3、【High Sensitivity and Reliable】: Smoke fire alarm equipped with built-in high sensitivity sensors and detection technology, ensuring reliable and safe fire detection. 4、【Loud Alarm Notification】: Fire alarm built-in 85dB sound and light alarm notifications effectively alert people to evacuate the scene, enhancing safety during emergencies. 5、【Long Battery Life and Easy to Use】: Smoke detector utilizes ultra-low power microcontroller and photoelectric principle technology, providing a battery life of 3 to 5 years(This product does not include batteries and requires self supply). Features one-click mute and self-check functions for convenient and worry-free use. Features: 【Wireless Fire Detection】: Smoke detector instantly detects fires and sends alarm signals to the fire control panel wirelessly within a range of 200m/656ft. Widely used in homes, factories, schools, shops, offices, villas, and other places that require fire protection. 【360° Smoke Detection】: Fire alarms smoke detectors provides full coverage smoke detection with no blind spots, ensuring reliable and accurate fire alarm notifications. 【High Sensitivity and Reliable】: Smoke fire alarm equipped with built-in high sensitivity sensors and detection technology, ensuring reliable and safe fire detection. 【Loud Alarm Notification】: Fire alarm built-in 85dB sound and light alarm notifications effectively alert people to evacuate the scene, enhancing safety during emergencies. 【Long Battery Life and Easy to Use】: Smoke detector utilizes ultra-low power microcontroller and photoelectric principle technology, providing a battery life of 3 to 5 years(This product does not include batteries and requires self supply). Features one-click mute and self-check functions for convenient and worry-free use. Specifications: Color: White Item size: 9 * 9 * 3.2 cm / 3.5 * 3.5 * 1.2 in Working voltage: 3V Standby current: ≥ 5 μ A Alarm current: >600mA Battery: 2 x AA batteries (Not include) Alarm sound: ≤ 85dB (within a range of 15cm/5.9in) 433 wireless transmission: RF433. 92 Alarm distance: 20-30 square meter Packing List: 1 x Wireless Smoke Detector 1 x Instruction Manual 1 x Screw Pack Package List 1 x Wireless Smoke Detector 1 x Instruction Manual 1 x Screw Pack