16KHz. Running 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 Protocols: TCP/IP, UDP, SIP. Signal-to-Noise Proportion: > 80dB. Frequency Action: 100Hz https://remingtonqlbvo.techionblog.com/30029547/selecting-the-right-ip-speaker-trick-features-to-think-about