ACTi IR 3-inch Dome camera ACM-3311 has been well received by the market. As we keep improving our products, we feel that this model and our ACM-3011 should be consolidated to reduce ordering complexity. The ACM-3011 has functions similar to ACM-3311 plus vari-focal lens. We will continue to provide ACM-3311 until 2010/7/1. We recommend all further orders to use ACM-3011 instead.