The phrase "dual cam" refers to a camera system that uses two separate cameras to capture photos or videos. This setup allows for better image quality, depth perception, and the ability to create special effects like portrait mode. Full definition
For an extra $ 995 you can get GM's 200 - horsepower 3.4 - liter Twin Dual Cam V - 6. (articles.orlandosentinel.com)
In 1991, a 200 - horsepower, 3.4 - liter Twin Dual Cam V - 6 was added to the options list. (articles.orlandosentinel.com)
Nothing wrong with this launch, but I feel Xiaomi could have launched / relaunched Mi Note 2 with dual cam setup (renamed something like Mi Note 2 Pro in India), which at least makes sense and can compete with their counterparts like Huawei, OnePlus, Samsung, Nubia, Oppo, Vivo, Gionee etc.. (gogi.in)