1. EASY INSTALLATION, FAST ALARM The Taimster MS1 tyre pressure monitoring system offers five alarm modes: fast air leak alarm, /low pressure alarm, temperature alarm, and sensor battery alarm (triggered when battery is low). The sensors are preprogrammed at the factory. 2. The alarm safety ranges are 25% PSI to 25% PSI for reference pressure and 25°F to 25°F for reference temperature. The alarm activates when monitored data falls outside these ranges. 3. Supports USB charging and includes a USB charging cable with dual fuses for 24/7 reliable operation. If the power icon flashes in sufficient sunlight, charge the display using the provided USB cable. 4. Solar and USB Charging This tyre pressure monitoring system supports both solar and USB charging. Featuring quality, durable solar lithium battery panels, the monitor has auto and memory functions, extending its lifespan and ensuring uninterrupted operation for drivers.