Feature:1. Low pressure alarm function.2. High pressure alarm function.3. High temperature alarm function.4. Leak alarm function.5. Low battery alarm function.6.ID learning function.7. High pressure, low pressure, high temperature threshold setting function.8. Tire exchange function.9. Barometric unit switching function.10. Auto sleep, vibration wake-up function.11.USB solar charging function. Specification: Input voltage: 4.5 V~6V (USB) Sleep current: Less than 70u A Life time: Never use it for normal use Operating temperature: -25~85 ℃ High frequency demodulation: FSKReceiving sensitivity: Less than -105 dbm Recommended temperature range: -30~85℃ Package Included:1 XTire Pressure Monitor System