16KHz. Running Temperature level: 0 ～ 45 ℃. Measurements: 144 * 144 * 34.1 mm. Network Horn Audio Speaker GEN-6391A03 Power Supply: DC24V/2.7 A or POE. Communication Protocol: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Ratio: > 80dB. Frequency Feedback: 100Hz https://troycfhjj.dm-blog.com/30086292/the-ultimate-guide-to-establishing-your-ip-pa-system-efficiently