18KHz. Running Temperature: -10 ～ 55 ℃. Measurements: 296x140x130mm. Network Sound Bridge GEN-3101A01 Power Supply: POE. Interaction Method: TCP/IP, UDP, SIP. Signal-to-Noise Proportion: > 85dB. Regularity Response: 50Hz https://andersonkaocz.blog2freedom.com/30011240/the-ultimate-overview-to-establishing-your-ip-pa-system-efficiently