18KHz. Running Temperature: -20 to 50 ° C. Dimensions: φ213 x 165mm. Network Wall Surface Mount Audio Speaker GEN-6011A03 Power Supply: DC24V/1A or POE. Interaction Protocol: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Proportion: > 80dB. Regularity Feedback: 100Hz https://bluetooth-speaker13232.activablog.com/29480086/transform-your-office-atmosphere-with-spon-communications-solutions