1, economic fire alarm 2, to detect the smoke and fire 3, smoke detector 4, CE for alarm system fire alarm1, economic fire alarm2, to detect the ... labyrinth 5. CMOS design 6. Best adaptability with environment 7. Manual test 8. High stability for smoke alarm9. High Density SMT ... degreeOperating Humidity: <95% RHAlarm Output: sound alarmSensitivity: I or II fire alarm