This robust SIP intercom device offers 2-way voice functionality with both a high-fidelity 8W HD speaker and 3 directional microphones with Multichannel Microphone Array Design (MMAD) that offer a 4.2 meter pickup distance. The GSC3510 supports a wide-range of peripherals including Bluetooth devices, built-in whitelist and blacklists to easily block unwanted calls, integrated dual-band WiFi and advanced acoustic echo cancellation. By pairing the GSC3510 with other Grandstre m devices, including desktop and cordless IP phones as well as the GDS series of Facility Access products, users can easily sculpt a state-of-the-art security and voice intercom solution. Thanks to it’s modern industrial design and rich features, the GSC3510 is the ideal intercom speaker/microphone for any setting. Features Full-duplex speakerphone with HD acoustic chamber, advanced acoustic echo cancellation 3 directional mics with MMAD & microphone beamforming array Full-band and wide-band audio codec support including Opus & G.722 Integrated dual-band 802.11 a/b/g/n WiFi and Bluetooth One 10/100Mbps network port with PoE/ PoE+ 2-pin multi-purpose input to support peripherals including call buttons