16KHz. Running Temperature level: 0 ～ 45 ℃. Dimensions: 144 * 144 * 34.1 mm. Network Horn Audio Speaker GEN-6391A03 Power Supply: DC24V/2.7 A or POE. Interaction Procedure: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Proportion: > 80dB. Regularity Action: 100Hz https://remingtonqlbvo.techionblog.com/30029547/selecting-the-right-ip-speaker-trick-features-to-think-about