Key features: -Amplifier: Built-in 10W Class D -Power supply: PoE(IEEE 802.3 af Type 1 Class 3), PoE+(IEEE 802.3 at Type 2 Class 4) -Internal memory: 1 GBytes -Frequency range (-10dB): 650Hz~5.3kHz -Sensitivity (1Watt): 111dB -IP code: IP66 -Supported protocols: IPv4, HTTP, SIP, mDNS, DNS, NTP, TCP, UDP, DHCP, ARP, ICMP TTS: English (US, UK), German, French, Spanish, Russian