Voyager WVOS511 Wireless Back-Up Observation System with 5.6" Color LCD Digital Wireless Observation System Featuring WI Sight Technology The Digital Wireless Observation System featuring WI Sight technology far exceeds the performance of any analog wireless observation system on the market WI Sight technology digitally locks the Voyager's camera to its monitor so it only communicates with that monitor, ignoring outside signals, eliminating interference WI Sight technology is strong enough to travel through and around objects and works on vehicles 60plus feet in length, a significantly longer distance than wireless analog systems WI Sight technology delivers a sharp, vivid picture of the vehicle's surroundings to the 5.6 color LCD monitor; suction cup mount and 12-volt DC power plug for the monitor make this system easily portable among towing vehicles