Electrical Power supply via 802.3af (PoE) Ethernet, 8 Watt max. Ethernet 10/100Mbps auto, 802.3af (PoE) RJ-45 connector with integrated Link/Activity LED Protocols: TCP/IP, UDP, RTP, SIP, DHCP, Multicast capable Headphone out Output impedance 0.1 Ohm 1 Watt max @ 8 Ohm Values @ 8 Ohm *: Frequency response 20 Hz .. 20 kHz (-3dB), Dynamic range 80dB, Signal to Noise Ratio -80dB Total Harmonic Distortion <0.15% (-3dBFS) Output level controllable via volume knob and software | Speaker Impedance 8 Ohm 1 Watt RMS max Values @ 8 Ohm: Frequency response 300 Hz .. 20 kHz (-3dB), Sound pressure 77dB, (1W @ 1 meter) Output level controllable via volume knob and software Mechanical Metal case, black powder coated, white plastic front, 316 g / 11 oz. Microphone built-in Electret condenser microphone, omni directional Output impedance <2.2 KOhms Frequency response 100 Hz .. 16 kHz Sensitivity (@ 1KHz, 0dB = 1V/Pa) -40 dB ±3dB Signal to Noise Ratio weighted (F = 1KHz 1Pa) >60 dB) | Microphone in Dynamic or Electret mic, Bias power (2.4..4 VDC) Frequency response 50Hz ..20kHz (-3dB)* Dynamic range 70dB, SNR -70dB, THD <0.05% (-3dBFS)* input sensitivity software controllable Audio formats MP3 encoding/decoding up to 192/320kbps PCM 16bit @ 8..48 kHz G.711, G.722 Discrete I/O Button A with white status LED Button B with bicolor status LED (red/green) | Dimensions (L x D x H) 105 x 75 x 28 mm (4.14 x 2.95 x 1.1 inch) MTBF (calculated according to MIL217F @ 25°C) Min. 350 000h * depends on used codec, best results @48kHz PCM ** 0 – 70% relative humidity, non-condensing |