The Grandstream GSC3516 SIP and Multicast Talk-Back Speaker delivers two-way audio communication with a powerful 15W HD speaker and advanced microphone array for clear voice pickup. Featuring built-in Wi-Fi, Bluetooth, PoE support, and compatibility with call buttons, it’s ideal for real-time paging, intercom, and security applications.

• 15W HD speaker with full-duplex audio and echo cancellation

• Includes 3 directional mics with MMAD and beamforming, plus 1 omnidirectional mic with 4.2m range

• Supports Opus, G.722, and other full/wide-band codecs

• Dual-band Wi-Fi and Bluetooth for flexible wireless connectivity

• PoE/PoE+ capable with a 2-pin input for external peripherals like call buttons