Additional Details ------------------------------ Product description: The GXP2160 is a Linux-based device with 6 lines, 5 XML programmable soft keys for customization and 5-way voice conferencing to keep business users in-touch. HD audio and a 4.3" color LCD screen create high quality calls, the built-on 24 BLF/speed-dial keys allow users to easily monitor presence and status of other extensions and transfer calls. Built-in Bluetooth support allows for use of Bluetooth headsets and transferring of phonebook and calls from paired mobile devices. This Enterprise IP phone also features Electronic Hook Switch support for Plantronics headsets and a built-in USB port. The GXP2160 is perfect for Enterprise SMB customers with the need for quality and versatility in their desktop communications.As all Grandstream IP phones do, the GXP2160 features state-of-the-art security encryption technology (SRTP and TLS). The GXP2160 supports a variety of automated provisioning options, including zero-configuration with Grandstream?s UCM series IP PBXs, encrypted XML files and TR-069, to make mass deployment extremely easy. 4-Pack.