Hikvision, 1000 W 4-zone network amplifier with 100 V/70 V output, supporting USB, Bluetooth, microphone and RCA audio inputs. Supports scheduled, live and emergency broadcasting, alarm linkage and TTS voice synthesis.

Speaker: Rated Power 25 W, Impedance 8 ,Direction 70° horizontal by 100° vertical, Max. Acoustic Pressure 124dBSPL, Frequency Response 300 Hz to 8 kHz, Support wired network , Interface Ethernet Interface; RJ45 10 M/100 M Adaptive Ethernet port × 1; Local Storage Built-in 4 GB EMMC (Audio file storage is 1 GB.); ISAPI, ISUP, 24Vdc, Function Audio Algorithm AEC,AGC,ANS, DRC :Audio Bit Rate G.711ulaw(64 Kbps)/G.711alaw(64 Kbps)/MP3(128 Kbps), Audio File Format MP3, WAV- NTP Timing- Support Broadcast Regular broadcast, live broadcast, emergency broadcast, Speech Synthesis English,12VDC output, alarm input