Tricess Keychain Tire Gauge,Portable Mini Digital 3 Settings Tire Gauge for Cars, Trucks, Motorcycles and Bicycles with Led Light, 100 PSI Lighted display screen for ultimate visibility in low light or at night Nozzle seals to valve stem for quick and accurate measurements EASY TO USE: Simple One Button Design to Power on and Select Mode. Long Lasting Batteries Included! Item size:3.74*0.77*1.78 inches Portable ,light and mini design.You can buckle the gauge with car key.It's mini and won't get you burdensome.