1. Measure smoke, app push notification 2. Easy to install on the wall or any surface with screws or tape 3. Double detection of smoke and temperature, sound and light alarm, photoelectric maze design 4. Intelligent linkage, alarm monitoring 5. ABS fire retardant material, good heat resistance, impact resistance 6. Efficient self-test, low power warning 7. Operating temperature: 0 to 40 degrees celsius 8. Viewing angle: 110 degrees 9. Battery life: 2500 triggers 10. Sensitive distance: 6 meters 11. Working voltage: 3V 12. Alarm current: 120mA-130mA 13. Power: about 0.36W 14. Power supply mode: built-in CR123A button battery 15. Dimensions: about 85 x 85 x 28mm 16. Weight: about 130g 17. Note: the product needs to be used with a zigbee gateway and cannot be used alone