Smoke alarm.Test Button,AC120-230V with 9V battery operated,85dB/m,sound and flash,Low battery warning. Test by hand,Dual sensor,Low battery warning. Low ... ,Strong adaptability for circumstance SMT design, high stabilityOperating voltage: AC120V or AC230V,9V Backup BatteryStatic current: ≤10uA Alarm current: ≤15mA Fixed Alarm indication: red ...