IP Audio Speaker, Two-way audio, Scheduler, Background Music, Text To Speech, 10W Amp, 101dB Output, Freq. Range 120Hz-20kHz, 1GB Internal Storage, Single Micro SD slot (Up to 32GB), Built in Relay, SUNAPI, Onvif, SIP, P2P-SIP, IP54, PoE, PoE+, White Color