High-Speed Industrial Grade Dual Core Chips. 1 GB Audio File Storage. Secure Startup. Batch unified Management of remote Platforms through IP Networks. Alarm Input, Arming Schedule and Audio Linkage. TTS Speech Synthesis and Text Broadcasting with natural and smooth standard Male and Female Dual Audio Options. Two-Way Audio by SIP. Rated Power 7 W, max. Acoustic Pressure 121 dBSPL, Direction 70° h / 100° v, Frequency Response 300 Hz ~ 13 kHz, Audio File Format MP3 / WAV, RJ45 10/100 Mbps Ethernet Port, IP67, PoE (802.3at), 16.4 W, Metal Material, Operating Temperature -30°C ~ +60°C. Support Hik-Connect, iVMS-4200, HikCentral Professional, Hik-Partner Pro, NVR, MileStone.