18KHz. Intercom: Sustained, Integrated Microphone. Operating Temperature level: -20 ～ 50 ℃. Measurements: 283.1 * 224.3 * 269mm. Network Ceiling Speaker GEN-6211A03 Power Supply: DC IP PA System 24V/1A or POE. Communication Protocols: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Proportion: > 80dB. Regularity Reaction: 100Hz
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