18KHz. Operating Temperature: -20 ～ 50 ℃. Measurements: 193x151.5 x292mm. Network Column Speaker GEN-6191A03 Power Supply: DC24V/1A or POE. Communication Procedure: TCP/IP, UDP, SIP. Signal-to-Noise Ratio: > 90dB. Frequency Action: 45Hz https://radio48337.glifeblog.com/29310595/enhance-your-communication-with-an-advanced-ip-pa-system-today