---

• + [PRODUCT] Smart Wireless Siren Heiman HS2WD series
• + [QUESTION] Why the interconnect siren didn’t report offline when i cut off power?
• + [QUESTION] What are the battery parameters of the siren and how long can it operate during a power outage?And light intensity?
• + [QUESTION] How could i turn off the interconnected siren,it still flash when i teke it off the mains power socket?
• + [QUESTION] Why the interconnected siren and fire button of RF444 show "unknown" after adding to the gateway?
• + [QUESTION] How to install the interconnected siren for extending communication signal?
• + [QUESTION] Can the volume of the cascaded alarm siren be adjusted? If I want to lower it, how can I do that?