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3 directional mics with MMAD & microphone beamforming array, One 10/100Mbps network port
View productCohesive Technologies — authorised Grandstream distributor in India
50W IP66 Outdoor Horn Speaker with Talk-Back
The Grandstream GSC3518HS is a SIP and multicast talk-back horn speaker that provides crystal clear HD audio through a high-fidelity 50-Watt speaker with IP66-rated water and dust protection. Built for outdoor campuses, public spaces, large offices, school playgrounds, hospitals, car parks and industrial sites, it delivers announcements and emergency notification over long distances while supporting two-way talk-back for intercom communication.
The GSC3518HS is designed for open outdoor areas where an indoor ceiling speaker would never be heard.
The GSC3518HS is designed for outdoor campuses, public spaces, large offices, school playgrounds, hospitals, car parks, warehouses and industrial sites where announcements need to carry over long distances.

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View productAnswers to common questions about the GSC3518HS — buying it in India, documentation and support.
The Grandstream GSC3518HS is a SIP and multicast talk-back horn speaker that provides crystal clear HD audio through a high-fidelity 50-Watt speaker with IP66-rated water and dust protection. Built for outdoor campuses, public spaces, large offices, school playgrounds, hospitals, car parks and industrial sites, it delivers announcements and emergency notification over long distances while supporting two-way talk-back for intercom communication.
Key features of the GSC3518HS include: High-Fidelity 50W Horn Speaker; IP66 Water and Dust Protection; Talk-Back Functionality; Crystal-Clear HD Audio; SIP and Multicast Paging; Network Powered.
Cohesive Technologies is the authorised distributor of Grandstream Networks in India and supplies the GSC3518HS across the country. Call +91 120 4830000, WhatsApp +91 7290000544 or email info@grandstreamindia.com for a quote.
You can download the official GSC3518HS datasheet (PDF). It lists the full technical specifications.
Yes. Cohesive Technologies offers consultation, installation, configuration, technical support and extended warranty for Grandstream products across India. See our support services.
It is designed for outdoor campuses, public spaces, large offices, school playgrounds, hospitals, car parks, warehouses and industrial sites where announcements need to carry over long distances.
Yes. It carries an IP66 rating for water and dust protection, so it is suitable for permanent outdoor installation in demanding conditions.
Yes. It is a talk-back horn speaker, so in addition to broadcasting announcements it supports two-way voice communication for intercom use.
The indoor GSC3505, GSC3506, GSC3510 and GSC3516 use cabinet-style speakers rated from 8W to 30W. The GSC3518HS uses a 50W horn design with IP66 weatherproofing specifically for outdoor long-throw coverage.
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