18KHz. Operating Temperature level: -20 ～ 50 ℃. Dimensions: 193x151.5 x292mm. Network Column Audio Speaker GEN-6191A03 Power Supply: DC24V/1A or POE. Communication Method: TCP/IP, UDP, SIP. Signal-to-Noise Ratio: > 90dB. Regularity Action: 45Hz https://emilionuaeh.blogocial.com/change-your-office-setting-with-spon-communications-solutions-65972540