16KHz. Operating Temperature: 0～45 ℃. Measurements: 144 * 144 * 34.1 mm. Network Paging Console XC-9037N Power Supply: DC12V/1.5 A. Display: 4-inch touchscreen, resolution 480 * 480. Communication Methods: TCP/IP, UDP, SIP. Signal-to-Noise Ratio: > 80dB. Frequency Response: 100Hz https://knoxfbdca.shoutmyblog.com/29504047/the-function-of-an-ip-paging-microphone-in-effective-office-interaction