16KHz. Operating Temperature level: 0 ～ 45 ℃. Measurements: 144 * 144 * 34.1 mm. Network Horn Audio Speaker GEN-6391A03 Power Supply: DC24V/2.7 A or POE. Communication Method: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Ratio: > 80dB. Regularity Action: 100Hz https://royalty-free-music82693.like-blogs.com/29871694/the-duty-of-an-ip-paging-microphone-in-effective-work-environment-interaction