... ,video capture adapter, dvr adapter,usb dvr adapter,dvr card,4 channels usb dvr,security dvr cardCharacteristicSize is like USB ... decode; It has high quality dimensional sound Audio ADC, does not need record by sound card; Lower noise, Anti-interleaving display and ... or aboveMicrosoft DirectX 8.0 or above6. Audio: Full-duplex sound card or integrated chips on mainboard7. Hard Disk: 20GB or above ...