18KHz. Operating Temperature level: -20 to 50 ° C. Capacities: φ213 x 165mm. Network Wall Surface Mount Audio Speaker GEN-6011A03 Power Supply: DC24V/1A or POE. Interaction Procedure: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Ratio: > 80dB. Frequency Response: 100Hz https://paging-system34467.angelinsblog.com/29461503/enhance-your-announcements-with-a-top-notch-ip-paging-microphone