18KHz. Operating Temperature: -10 ～ 55 ℃. Dimensions: 296x140x130mm. Network Audio Bridge GEN-3101A01 Power Supply: POE. Communication Method: TCP/IP, UDP, SIP. Signal-to-Noise Proportion: > 85dB. Regularity Response: 50Hz https://soundbar09641.tblogz.com/discover-the-conveniences-of-using-an-ip-speaker-for-clearer-announcements-44079780