Output level: +6dBV ± 3dB Frequency response: 20Hz ~ 20kHz 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 Supported protocols: IPv4, HTTP, SIP, mDNS, DNS, NTP, TCP, UDP, DHCP, ARP, ICMP TTS: English (US, UK), German, French, Spanish, Russian Audio monitoring: Speaker, connection test