Note: The 507 SC and the 507SCE, Mount the same way. The Monitors are slightly different.
Truck System Technologies 507SCE Trucking Tire Pressure Monitoring System w/10 tire sensors for tractors with duals, RVs or Tow Vehicles. Expandable to 36 tires, the TPMS includes a Trailer Exchange Repeater for easy 1 touch drop and hook trailer exchange. The TST507SCE10 features a large easy read and programmable display that immediately warns the driver that preset temp and pressure settings have been reached.
Kit comes with a Repeater. A Repeater Consist of a Receiver, an Amplifier and Transmitter. Unlike most Amplifiers, the Repeater eliminates unwanted noise
Monitor is powered by hardwires directly into the ignition
Automatic activation when engine is running, whether vehicle is stationary or in motion