Quick overview from the supplier:
Grandstream GRP2602P, 4 SIP, 2 Lines, PoE, Black
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Supports 2 lines, and 4 SIP accounts
Supported by GDMS which provides a centralized interface to configure, provision, manage and monitor Grandstream devices
Electronic Hook Switch (EHS) support for Plantronics, Jabra, and Sennheiser headsets
Full-duplex speakerphone with HD audio to maximize audio quality and clarity
Equipped with noise shield technology to minimize background noise
The GRP2602P/GRP2602G includes built-in PoE to power the device and give it a network connection
Supports 5-way audio conferencing for easy conference calls
Enterprise-level protection including secure boot, dual firmware images, and encrypted data storage
Swappable faceplate to allow for easy logo customization
https://www.grandstream.com/products/ip-voice-telephony-carrier-grade-ip-phones/grp-series-essential-ip-phones/product/grp2602-p-w-g
