Grandstream Networks GHP621. Product type: IP Phone, Product colour: Black, Handset type: Wired handset. Lines quantity: 2 lines. Display: LCD. Ethernet LAN interface type: Gigabit Ethernet, Ethernet LAN data rates: 10,100 Mbit/s, Wi-Fi standards: 802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac). AC adapter input voltage: 100 – 240 V, Input frequency: 50/60 Hz, AC adapter output voltage: 12 V