Yealink W80DM. Management protocols: TFTP/FTP/HTTP/HTTPS/RPS, Supported network protocols: SIP v1 (RFC2543), v2 (RFC3261), SNTP/NTP, VLAN (802.1Q and 802.1P), 802.1x, LLDP, STUN, UDP/TCP/TLS, Security algorithms: AES, HTTPS, SHA-256, SHA-384, SHA-512, SRTP, TLS. Phonebook capacity (per handset): 100 entries. Frequency range (EU): 1880 - 1900 MHz, Frequency range (US): 1920 - 1930 MHz, Maximum indoor range: 1968.5" (50 m). Product color: White. Input voltage: 100 - 240 V, Output voltage: 5 V, Output current: 1.2 A