16KHz. Running Temperature level: 0 ～ 45 ℃. Dimensions: 144 * 144 * 34.1 mm. Network Horn Speaker GEN-6391A03 Power Supply: DC24V/2.7 A or POE. Interaction Method: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Proportion: > 80dB. Frequency Action: 100Hz https://bluetoothspeaker76295.blogadvize.com/36841547/spon-communications-leading-the-way-in-innovative-ip-pa-system-designs