GRP2636 VoIP SIP Wi-Fi 802.11 a / b / g / n / ac telephone, 2 x Gigabit Ethernet, 8 x line keys, 10 MPK extension keys with paper slot, AC (adapter included) + PoE, 2.8 inch colour TFT LCD, HD audio, RJ9 headset jack, EHS support for specific Plantronics headsets (EHS cable required), Bluetooth, USB, compatible with Grandstream Device Management System (GDMS) cloud provisioning platform. Standard 1-Year Manufacturer’s Warranty