Smart Restroom Trailer Technology is available on luxury and event restroom trailers from Rich Specialty Trailers. Onboard GPS and computer technology helps manage fleets, as owners can use their cellphone or computer to remotely check the temperature, power, tank status and location of units. The goal is to help create extra assurance that rentals will go smoothly, which means better service and more rental bookings, according to the maker. The technology is available on a full line of restroom, shower and specialty trailers from two to 12 stations. 260-593-2279; www.portablerestroomtrailer.com.