Tire Pressure Monitor Sensor Easily Monitor Tire PressureOur Tire Pressure Monitor Sensor (TPMS) enables you to monitor your motorcycle's tire pressure easily and conveniently, as you ride. The system works with up to 4 tires in any configuration (not intended for automotive use). One TPMS sensor is required for each tire (sold separately; metal valve stems only).Tire Pressure Information At A GlanceFasten 1 TPMS sensor to each metal tire valve stem, then pair TPMS with your zumo; 390. TPMS uses ANT technology to deliver pressure data wirelessly to your zumo 390. View the real-time data right on your zumo display.TPMS lets you set custom pressure thresholds. If tire pressure changes, TPMS issues an alert. TPMS also enables you to monitor tire pressure trends over time. With TPMS, it's possible to detect a slow leak before it becomes a bigger problem.Small and SmartTPMS is the smallest motorcycle tire pressure sensor on the market. Each TPMS sensor is powered by a single, replaceable battery that may last up to 18 months, depending on individual use. To preserve battery life, TPMS rests in low-power mode, then 'wakes up' when movement is detected.Compatible Devices:zūmo; 390LMzūmo; 590LMWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.