1 - Sku Lower Inventory Both 315MHz + 433MHz Frequencies Combined In 1 - Sensor Head. Save Money With Improved Efficiency And Reduce Inventory! Quality Control Tested & certified to meet SAE standards, Series numbers provide quality control ensuring only high quality parts are used and guaranteed defect free Lower Weight 12g lower MX-Sensor weight is significantly lighter than most sensors ensures greater security and stability for durable use Max Signal Strength Maximum sensor signal strength to program up to 16 sensors wirelessly including sensors already mounted on the wheel 98% Coverage Programmable 1-Sensor updates during installation for current coverage and service nearly every TPMS-equipped vehicle Press Release Exclusive press release valve provides the interchangeable rubber & metal valve stems easy removal and replacement by hand without a tool Battery Reliability Superior sensor battery power provides maximum sensor life, longer than most sensors ensuring greater replacement value