18KHz. Operating Temperature level: -20 to 50 ° C. Capacities: φ213 x 165mm. Network Wall Mount Audio Speaker GEN-6011A03 Power Supply: DC24V/1A or POE. Interaction Procedure: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Ratio: > 80dB. Regularity Feedback: 100Hz https://power-line70900.targetblogs.com/30517617/the-ultimate-guide-to-setting-up-your-ip-pa-system-efficiently