Smoke/Fire Alarm Systems Product description: Detector Power£º110VAC/220VAC/230VAC (backup 9v battery), 9v battery, 12VDC 1. Ceiling or wall mounting 2. Easy to install with mounting hardware included 3.110VAC/230VAC with 9VDC battery backup 4. Suitable for any room 5. Flash alarm indicator (red) 6. Test button for easy recommended monthly testing 7. Low battery signal 8. Safety clip feature, not allow mounting of smoke alarm 9. Without battery installed 10. Photoelectric chamber for early detection from all directions 11. Loud 85dB alarm signal 12. Specifications: 13. Power Source: 110VAC/230VAC with 9VDC battery backup 14. Operating Current: 10 uA (normal) and 20-50 mA 15. Operating Temperature: 40oF - 100oF (4. 4C - 37.8oC) 16. Ambient Humidity: 10% - 90%. 17. Horn Level: 85 Decibels at 10 feet. 18. Battery life: 1 year min. 19. Interconnecting Gas detector 20.(1)Circuit for normally closed rely contacts (optional) (2)Circuit for normally opened rely contacts (optional) (3)Operating Frequency: 433 MHZ/315MHZ (optional) 21. Size: 125mm*30mm 22. Weight: 168g/pc 23. Package size: 58.5cm*42.5cm*30.6cm 24. Quantity/BOX: 80pcs 25.CtnWei£¨kg£©:17kg 26.Q`CTY/20`FT£º339200pcs If you would like to look at smoke detector, please contact us, we will reply you at the first time. Our smoke alarms have own perfect quality, steady performance, reasonable price; Hope we could help you on business. Summer Pan