16KHz. Operating Temperature: 0 ～ 45 ℃. Measurements: 144 * 144 * 34.1 mm. Network Horn Speaker GEN-6391A03 Power Supply: DC24V/2.7 A or POE. Communication Procedure: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Ratio: > 80dB. Regularity Feedback: 100Hz https://opticalnearme94691.howeweb.com/30571022/the-role-of-an-ip-paging-microphone-in-effective-office-interaction