PoE: 802.3af, Class 3, 36 V to 57 V, 0.22 A to 0.13 A, max. Built-In Microphone -U: Yes. Audio Sampling Rate -U: 8 kHz/16 kHz/32 kHz/44.1 kHz/48 kHz. Audio Compression -U: G.711ulaw/G.711alaw/G.722.1/G.726/MP2L2/PCM/MP3/AAC-LC.
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