18KHz. Running Temperature: -10 ~ 50 ℃. Dimensions: 440x300x44mm. Area Mixing Digital Amplifier NBS-2301 Power Supply : AC 220V, 50Hz. Power : 130W , 260W , 360W , 550W , 700W. Communication Method : HTTP, TCP/IP, UDP, ARP, ICMP, IGMP. Signal-to-Noise Proportion :. Mic Input 01: ≥ 65dB,. Mic Input https://opticalnearme94691.howeweb.com/30571022/the-role-of-an-ip-paging-microphone-in-effective-office-interaction