Abstract: Test system and method comprise battery powered wireless camera for tractor-trailer vehicles and/or unmarried vehicles on road. Removable (magnetic) camera unit can be selectively mounted on trailer and provide image, video and audio monitoring solution to better assist drivers overcome blind spots around tractors and trailers. Wireless camera system includes one or more camera-containing units that can be attached to any trailer, in nonpermanent manner, using magnets and powered by battery enclosed in a single housing where camera is located. Camera unit can provide real time infrared, night vision, video and/or audio to tractor cab through generic or dedicated monitor located in cab. Crosstalk between camera-containing units is mitigated by individually pairing each camera unit with a monitor/receiver at any given time and using appropriate communication protocols. Camera-containing unit can include solar panel, can be permanently mounted, and can be recharged using photovoltaic cells.