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 Methods: TCP/IP, UDP, SIP. Signal-to-Noise Proportion: > 80dB. Frequency Response: 100Hz https://griffinbeddz.qodsblog.com/29994038/the-function-of-an-ip-paging-microphone-in-effective-work-environment-communication