Grandstream SIP/Multicast Talk-Back Speaker, 15W Speaker GSC3516 GXP2140 With features such as customizable

With features such as customizable call-routing

emergency button

offering extended mobility to business and residential users

3 XML programmable context-sensitive soft keys

Antihacking secure boot & critical data/control lockdown via digital signatures

Grandstream SIP/Multicast Talk-Back Speaker, 15W Speaker GSC3516 GXP2140 With features such as customizableFull duplex speakerphone with HD acoustic chamber, advanced acoustic echo cancellation 3 directional mics with MMAD & microphone beamforming array and 1 omnidirectional auxiliary microphone Full band and wide band audio codec support including Opus & G. 722 Integrated dual band 802. 11 a b g n ac Wi Fi and Bluetooth One 10 100Mbps network port with PoE PoE+ 2 pin multi purpose input to support peripherals including call buttons GSC3516 SIP Multicast