Grandstream GSC3510 SIP intercom speaker and microphone designed for two-way voice communication, paging, and security applications in offices, schools, hospitals, apartments, and other indoor environments. 

What it does?
Provides two-way SIP voice communication through an integrated HD speaker and microphone array. It can connect through Ethernet with PoE/PoE+, Wi-Fi, or Bluetooth, making it suitable for intercom and paging systems. 

Features:

•  Brand: Grandstream 
•  Model: GSC3510 
•  Product Type: SIP Intercom Speaker & Microphone 
•  8W HD speaker 
•  3 directional microphones with beamforming 
•  Full-duplex two-way communication 
•  10/100 Mbps Ethernet with PoE/PoE+ 
•  Dual-band 2.4GHz/5GHz Wi-Fi 
•  Bluetooth 4.0 + EDR 
•  Supports Opus and G.722 audio codecs 
•  Microphone pickup distance up to 4.2 meters 
•  2-pin multifunction input for peripherals such as call buttons 
•  Suitable for offices, schools, hospitals, apartments, and commercial facilities