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. Communication Method: TCP/IP, UDP, SIP, ONVIF. IP Paging Microphone Signal-to-Noise Ratio: > 80dB. Regularity Action: 100Hz

The finite dimension from the Airy disk sets an inevitable limit on the achievable resolving power of a visual instrument. Rayleigh located that two adjacent and Similarly dazzling stars can just be resolved In the event the image of 1 star falls somewhere near the innermost dark ring during the Airy disk of one other star; the resolving power of t