Лень читать про AHD?! Смотри разницу)

(The Video has been compressed for upload, actual video delivers higher resolution) T.S. Microtech has the widest range of AHD products in the US. Providing competitive price points for all dealers and distributors in the market. AHD is a new technology that we have released that will enable current analog systems, to be upgraded into High Definition quality without needing to replace existing cable infrastructure. Please give us a call for pricing and further information (626) 839-8998