A4Tech AU-400
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| Brand: | A4Tech |
| Description: | 2.0 -- |
| Peculiarities: | Loudspeaker for IP-telephony |
| Type: | 2.0 |
| Signal to noise ratio: | 60 dB |
| Frequency response: | 20-20000 Hz |
| Nutrition: | From the network |
| Microphone input: | There is |
| Number of front speaker bands: | 1 |
| Front speaker power: | 2 W |
| Total power: | 4 W |