16KHz. Running Temperature level: 0～45 ℃. Dimensions: 144 * 144 * 34.1 mm. Network Paging Console XC-9037N Power Supply: DC12V/1.5 A. Display: 4-inch touchscreen, resolution 480 * 480. Interaction Procedures: TCP/IP, UDP, SIP. Signal-to-Noise Ratio: > 80dB. Frequency Response: 100Hz https://communicationssystem15824.activoblog.com/30811337/discover-the-advantages-of-using-an-ip-speaker-for-clearer-announcements