16KHz. Running Temperature level: 0～45 ℃. Dimensions: 144 * 144 * 34.1 mm. Network Paging Console XC-9037N Power Supply: DC12V/1.5 A. Show: 4-inch touchscreen, resolution 480 * 480. Interaction Procedures: TCP/IP, UDP, SIP. Signal-to-Noise Proportion: > 80dB. Frequency Action: 100Hz https://juliuswsldu.goabroadblog.com/29434293/picking-the-right-ip-speaker-secret-features-to-consider