По поводу тракторов и прочего в США, для примера. Blootooth может и не стоит, но такие устройства - не редкость
http://www.deere.com/en_US/ag/servic...-products.html
Как живут и работают фермеры в США
http://www.agriculture.com/
На таких космических кораблях работают тамошние колхозники...
И что там внутри, поинтересуется любопытный?
Deluxe ComfortCommand Seat with Air Suspension, Swivel, Fore-aft and Lateral Attentuation with aDjustable Armrest Controls
Storage Drawer under Seat
Four Rear Roof-mounted 65 Watt Halogen Floodlights and Entry Light
Swing-Out Rear Window 30 Degrees
Monitor Mounts on Right-Hand Front Post, Center Console, and Rear Cab Posts
AM/FM Radio Wiring and Mounting Bracket and Antenna
Tinted Glass
Air Conditioner and Heater
Extremity Warning Lights
Adjustable Armrest Controls
Transport Lock for Remote Cylinder Valves
Two-Speed and Intermittent Front Wiper
Rear Windshield Wiper and Dual Front and Rear Washer
Front Sun Visor
Two Inside Rearview Mirrors
Antenna Mount and Wiring for Business Band Radio
FieldCruise™
Tote Pan
Electrical Powerstrip with Six Additional Outlets
Analog Oil Pressure Gauge
Decelerator
Left-Hand Storage Drawer