Network Horn Speaker 7W

• Adopt high-speed industrial grade dual core chips, built-in NOR Flash+EMMC dual storage, support dual backup of the system to ensure stable and reliable system performance.
• Support secure startup, user login locking mechanism, and password complexity prompts, support security audit log traceability, and improve system network security.
• Support batch unified management of remote platforms through IP networks (local area networks/public networks) and flexible configuration of local WEB single machines, while also support local audio collection and playback, adapting to various scene applications.
• Support alarm input, arming schedule, and audio linkage, support TTS speech synthesis and text broadcasting, with natural and smooth standard male and female dual audio options.
• Support two-way audio by SIP

How much volume is lost over distance?

We have this table which can explain the decrease in SPL based on distance. 
 

 
For example based on the above, at 100m the speaker will be roughly 70db.