Grandstream GRP2602, 4 SIP, 2 Lines, no 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
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