Click to expand Tap to zoom Hanwha Techwin SRX-AU121I Audio Adapter for DVR by Hanwha Techwin SKU SRX-AU121I 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to Quote Features DVR audio input connector accessory DB25 to 12x RCA audio connectors for audio input for various DVRs, when using more than 4x inputs.