The first one is the fact that there is a limited viewable area in a smartphone. (elearningindustry.com)
The Institute supported the rearview camera requirement but also requested that NHTSA consider the feasibility of regulating the size and position of the directly viewable areas behind vehicles in a separate rulemaking action. (iihs.org)
The result is the largest viewable area we have ever produced. (androidcentral.com)