Yealink W70B. Maximum range: 300 m, Management protocols: SNTP/NTP, UDP/TCP/TLS, Security algorithms: AES, HTTPS, SHA-256, SHA-384, SHA-512, TLS. Phonebook capacity (per handset): 1000 entries. Frequency range (EU): 1880 - 1900 MHz, Frequency range (US): 1920 - 1930 MHz. Ethernet LAN data rate supported (max): 100 Mbit/s. Product colour: Grey, Certification: CE, FCC, REACH