photoelectric smoke alarm with 9VDC battery CEILING TYPE SMOKE ALARM WITH CE APPROVALALARMFeatures: - Ceiling or wall mounting - Easy to install with mounting hardware included - 9VDC battery - Suitable for any room - Flash alarm indicator (red) - Test button for easy recommended monthly testing - Low battery signal- Safety clip feature, not allow mounting of smoke alarmwithout battery installed - photoelectric chamber for early detection from all directions - Loud 85dB alarm signal